Photographing optical lens assembly, imaging apparatus and electronic device

ABSTRACT

A photographing optical lens assembly includes eight lens elements, the eight lens elements being, in order from an object side to an image side, a first lens element, a second lens element, a third lens element, a fourth lens element, a fifth lens element, a sixth lens element, a seventh lens element and an eighth lens element. Each of the eight lens elements has an object-side surface facing towards the object side and an image-side surface facing towards the image side. At least one surface of the object-side surface and the image-side surface of at least one lens element of the photographing optical lens assembly is aspheric and includes at least one inflection point.

RELATED APPLICATIONS

This application claims priority to Taiwan Application Serial Number107123175, filed Jul. 4, 2018, which is herein incorporated byreference.

BACKGROUND Technical Field

The present disclosure relates to a photographing optical lens assemblyand an imaging apparatus. More particularly, the present disclosurerelates to a photographing optical lens assembly and an imagingapparatus with a compact size applicable to electronic devices.

Description of Related Art

With the advanced semiconductor manufacturing technologies, theperformances of image sensors are enhanced, and the pixel size isminified. Therefore, photographing optical lens assemblies with highimage quality become indispensable.

Moreover, with the rapid scientific and technological progress, theapplication scope of electronic devices equipped with photographingoptical lens assemblies becomes wider, and the requirements forphotographing optical lens assemblies are more diverse. However, it ishard for balancing the requirements, such as image quality, sensitivity,aperture size, volume and field of view, in conventional photographingoptical lens assemblies. Therefore, a photographing optical lensassembly is provided by the present disclosure to satisfy the desiredrequirement.

SUMMARY

According to one aspect of the present disclosure, a photographingoptical lens assembly includes eight lens elements, the eight lenselements being, in order from an object side to an image side, a firstlens element, a second lens element, a third lens element, a fourth lenselement, a fifth lens element, a sixth lens element, a seventh lenselement and an eighth lens element. Each of the eight lens elements hasan object-side surface facing towards the object side and an image-sidesurface facing towards the image side. At least one surface of theobject-side surface and the image-side surface of at least one lenselement of the photographing optical lens assembly is aspheric andincludes at least one inflection point. When a half of a maximum fieldof view of the photographing optical lens assembly is HFOV, and an axialdistance between the object-side surface of the first lens element andan image surface is TL, the following conditions are satisfied:55.0 degrees<HFOV; and1.0 mm<TL<12.0 mm.

According to another aspect of the present disclosure, an imagingapparatus includes the photographing optical lens assembly of theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on the image surface of the photographing optical lensassembly.

According to another aspect of the present disclosure, an electronicdevice includes the imaging apparatus of the aforementioned aspect.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure.

FIG. 2 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 1stembodiment.

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure.

FIG. 4 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 2ndembodiment.

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure.

FIG. 6 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 3rdembodiment.

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure.

FIG. 8 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 4thembodiment.

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure.

FIG. 10 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 5thembodiment.

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure.

FIG. 12 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 6thembodiment.

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure.

FIG. 14 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 7thembodiment.

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure.

FIG. 16 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 8thembodiment.

FIG. 17 is a schematic view of an imaging apparatus according to the 9thembodiment of the present disclosure.

FIG. 18 shows spherical aberration curves, astigmatic field curves and adistortion curve of the imaging apparatus according to the 9thembodiment.

FIG. 19 is a schematic view of an image capturing apparatus according tothe 10th embodiment of the present disclosure.

FIG. 20 shows spherical aberration curves, astigmatic field curves and adistortion curve of the image capturing apparatus according to the 10thembodiment.

FIG. 21 shows a schematic view of inflection points according to the 1stembodiment of FIG. 1.

FIG. 22 shows a schematic view of critical points and parameters Y11,Y82, Yc82 according to the 1st embodiment of FIG. 1.

FIG. 23 shows a schematic view of the parameter CRA according to the 1stembodiment of FIG. 1.

FIG. 24 is a three-dimensional schematic view of an imaging apparatusaccording to the 11th embodiment of the present disclosure.

FIG. 25A is a schematic view of one side of an electronic deviceaccording to the 12th embodiment of the present disclosure.

FIG. 25B is a schematic view of another side of the electronic device ofFIG. 25A.

FIG. 25C is a system schematic view of the electronic device of FIG.25A.

FIG. 26 is a schematic view of an electronic device according to the13th embodiment of the present disclosure.

DETAILED DESCRIPTION

A photographing optical lens assembly includes eight lens elements, theeight lens elements being, in order from an object side to an imageside, a first lens element, a second lens element, a third lens element,a fourth lens element, a fifth lens element, a sixth lens element, aseventh lens element and an eighth lens element. Each of the eight lenselements has an object-side surface facing towards the object side andan image-side surface facing towards the image side.

The first lens element can have negative refractive power. Therefore, itis favorable for increasing the light intensity of the wide field ofview so as to enlarge the field of view. The object-side surface of thefirst lens element can be planar or concave in a paraxial regionthereof. Therefore, it is favorable for reducing the volume occupationof the first lens element and correcting aberrations under the design ofthe wide field of view.

The second lens element can have positive refractive power. Therefore,it is favorable for reducing the total track length and correctingaberrations resulted from enlarging the field of view by the first lenselement.

The fourth lens element can have positive refractive power. Therefore,it is favorable for sharing the responsibility of reducing the totaltrack length so as to reduce the sensitivity and decrease aberrationsgenerated by a single lens element.

The object-side surface of the eighth lens element can be convex in aparaxial region thereof. Therefore, it is favorable for reducingaberrations, such as the field curvature, by adjusting the surface shapeof the eighth lens element. The image-side surface of the eighth lenselement can be concave in a paraxial region thereof, so that thephotographing optical lens assembly can have the back focal length witha proper length.

At least one surface of the object-side surface and the image-sidesurface of at least one lens element of the photographing optical lensassembly includes at least one inflection point. That is, at least onesurface among from the object-side surface of the first lens element tothe image-side surface of the eighth lens element includes at least oneinflection point. Therefore, it is favorable for enhancing asphericchanges so as to reduce aberrations, improve the image quality andreduce the volume. Moreover, each surface of at least two or threesurfaces among from the object-side surface of the first lens element tothe image-side surface of the eighth lens element can include at leastone inflection point. Furthermore, at least one surface of theobject-side surface and the image-side surface of each lens element ofat least four, five, or six lens elements of the photographing opticallens assembly can include at least one inflection point.

At least one surface of the object-side surface and the image-sidesurface of at least one lens element of the photographing optical lensassembly can include at least one critical point in an off-axis regionthereof. That is, at least one surface among from the object-sidesurface of the first lens element to the image-side surface of theeighth lens element can include at least one critical point in anoff-axis region thereof. Therefore, it is favorable for adjusting therefractive angle of the light to reduce the surface reflection, so thatthe illuminance of the light on an image surface can be raised, theaberration corrections can be enhanced, and the stray light can bereduced. Moreover, the object-side surface of the first lens element caninclude at least one critical point in an off-axis region thereof.Moreover, at least one surface among from the object-side surface of theseventh lens element to the image-side surface of the eighth lenselement can include at least one critical point in an off-axis regionthereof. Furthermore, the object-side surface of the first lens elementcan include at least one convex critical point in an off-axis regionthereof. Furthermore, at least one surface of the image-side surface ofthe seventh lens element and the image-side surface of the eighth lenselement can include at least one critical point in an off-axis regionthereof. When the object-side surface of the first lens element includesat least one critical point in an off-axis region thereof, it isfavorable for reducing the incident angle of the wide angle light on thefirst lens element so as to decrease the surface reflection. When theobject-side surface of the first lens element includes at least oneconvex critical point in an off-axis region thereof, the aforementionedeffects can be enhanced. When the image-side surface of the seventh lenselement includes at least one critical point in an off-axis regionthereof, it is favorable for adjusting the incident angle of the lighton the eighth lens element so as to reduce the stray light and raise theilluminance of the light on the image surface. When the image-sidesurface of the eighth lens element includes at least one critical pointin an off-axis region thereof, it is favorable for adjusting theincident angle of the light on the image surface so as to increase theresponse efficiency of an image sensor and correct peripheralaberrations.

One lens element of the photographing optical lens assembly can be madeof a plastic material. Moreover, at least five lens elements of thephotographing optical lens assembly can be made of plastic materials.Moreover, at least six lens elements of the photographing optical lensassembly can be made of plastic materials. Furthermore, any surface ofthe object-side surface and the image-side surface of the lens elementmade of the plastic material can or cannot include at least oneinflection point, and can or cannot include at least one critical point.

At least two lens elements of the photographing optical lens assemblycan be made of plastic materials. The at least two lens elements arelocated adjacent to each other and aspheric cemented. Asphericcoefficients of the at least two lens elements are different. Therefore,cemented lens elements are advantageous in increasing the stability, theyield rate and environmental adaptability. Cemented surfaces beingaspheric surfaces with different aspheric coefficients are beneficial tocorrect aberrations so as to enhance the image quality.

When a half of a maximum field of view of the photographing optical lensassembly is HFOV, the following condition is satisfied: 55.0degrees<HFOV. Therefore, it is favorable for the photographing opticallens assembly to be featured with a wide field of view so as to expandthe application range. Moreover, the following condition can besatisfied: 55.0 degrees<HFOV<80.0 degrees. Therefore, the excessivedistortion can be avoided.

When an axial distance between the object-side surface of the first lenselement and the image surface is TL, the following condition issatisfied: 1.0 mm<TL<12.0 mm. Therefore, it is favorable for maintainingthe short total track length of the photographing optical lens assemblyand increasing the manufacturing and assembling yield rates. Moreover,the following condition can be satisfied: 2.0 mm<TL<7.0 mm.

When a vertical distance between the critical point in the off-axisregion on the image-side surface of the eighth lens element and anoptical axis is Yc82, and a vertical distance between a maximumeffective diameter position of the image-side surface of the eighth lenselement and the optical axis is Y82, the following condition issatisfied: 0.10<Yc82/Y82<0.90. Therefore, it is favorable for furthercorrecting aberrations by adjusting the position of the critical point.

When a central thickness of the sixth lens element is CT6, a centralthickness of the seventh lens element is CT7, and a central thickness ofthe eighth lens element is CT8, the following condition is satisfied:0<(CT7+CT8)/CT6<2.20. Therefore, it is favorable for the lens elementslocated near the image side of the photographing optical lens assemblyto cooperate with each other so as to correct peripheral aberrations,such as the field curvature.

When an axial distance between the first lens element and the secondlens element is T12, and a central thickness of the second lens elementis CT2, the following condition is satisfied: 0<T12/CT2<2.5. Therefore,it is favorable for balancing the field of view and the volume byadjusting the lens thickness and the space between the first lenselement and the second lens element. Moreover, the following conditioncan be satisfied: 0.40<T12/CT2<1.7.

When an axial distance between the fifth lens element and the sixth lenselement is T56, and an average value of axial distances between everyadjacent lens elements of the photographing optical lens assembly isTavg, the following condition is satisfied: 0<T56/Tavg<1.30. Therefore,it is favorable for avoiding an overly large space between the fifthlens element and the sixth lens element and adjusting spaces betweenevery adjacent lens elements simultaneously so as to reduce the volume.Moreover, the following condition can be satisfied: 0<T56/Tavg<0.90.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and an entrance pupil diameterof the photographing optical lens assembly is EPD, the followingcondition is satisfied: 2.40<TL/EPD<8.50. Therefore, it is favorable forbalancing the total track length and the size of the aperture stop ofthe photographing optical lens assembly. Moreover, the followingcondition can be satisfied: 4.00<TL/EPD<7.50.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and a focal length of thephotographing optical lens assembly is f, the following condition issatisfied: 1.70<TL/f<12.0. Therefore, it is favorable for maintaining aproper total track length while enlarging the field of view of thephotographing optical lens assembly. Moreover, the following conditioncan be satisfied: 2.40<TL/f<10.0.

When the axial distance between the object-side surface of the firstlens element and the image surface is TL, and a maximum image height ofthe photographing optical lens assembly is ImgH, the following conditionis satisfied: 1.0<TL/ImgH<6.0. Therefore, it is favorable formaintaining the image quality while reducing the total track length andenlarging the area of the image surface. Moreover, the followingcondition can be satisfied: 1.8<TL/ImgH<5.4.

When a vertical distance between a maximum effective diameter positionof the object-side surface of the first lens element and the opticalaxis is Y11, and the vertical distance between the maximum effectivediameter position of the image-side surface of the eighth lens elementand the optical axis is Y82, the following condition is satisfied:0.45<Y11/Y82<3.0. Therefore, it is favorable for adjusting the ratiobetween the outer diameter of the object side and the outer diameter ofthe image side of the photographing optical lens assembly so as tobalance the field of view, the image quality and the volume thereof.

When a curvature radius of the object-side surface of the first lenselement is R1, and a curvature radius of the image-side surface of thefirst lens element is R2, the following condition is satisfied:−1.0<(R1+R2)/(R1−R2)<4.5. Therefore, it is favorable for providing aproper incident angle and a proper exit angle of the light on the firstlens element by adjusting the surface shape of the first lens element.Moreover, the following condition can be satisfied:−0.70<(R1+R2)/(R1−R2)<3.5.

When the focal length of the photographing optical lens assembly is f,and a composite focal length of the first lens element and the secondlens element is f12, the following condition is satisfied:−0.90<f/f12<0.60. Therefore, it is favorable for reducing aberrations bythe cooperation between the first lens element and the second lenselement.

When the focal length of the photographing optical lens assembly is f,and a composite focal length of the first lens element, the second lenselement and the third lens element is f123, the following condition issatisfied: −0.14<f/f123<0.54. Therefore, it is favorable for preventingthe photographing optical lens assembly from excessive aberrationscaused by overly refractive power of the object side so as to enhancethe image quality.

When the focal length of the photographing optical lens assembly is f,and the curvature radius of the object-side surface of the first lenselement is R1, the following condition is satisfied: f/|R1|<1.60.Therefore, it is favorable for the photographing optical lens assemblyto be applicable to the design of a wide field of view by adjusting thefirst lens element and the focal length of the photographing opticallens assembly. Moreover, the following condition can be satisfied:f/|R1|<1.20.

When the focal length of the photographing optical lens assembly is f, afocal length of the first lens element is f1, a focal length of thesecond lens element is f2, a focal length of the third lens element isf3, a focal length of the fourth lens element is f4, a focal length ofthe fifth lens element is f5, a focal length of the sixth lens elementis f6, a focal length of the seventh lens element is f7, a focal lengthof the eighth lens element is f8, and a maximum value among |f/f1|,|f/f2|, |f/f3|, |f/f4|, |f/f5|, |f/f6|, |f/f7| and |f/f8| is |P|max, thefollowing condition is satisfied: |P|max≤1.0. Therefore, it is favorablefor avoiding a single lens element with overly refractive power so as toreduce the sensitivity of each lens element and increase the yield rate.

When the maximum image height of the photographing optical lens assemblyis ImgH, and the focal length of the photographing optical lens assemblyis f, the following condition is satisfied: 1.0<ImgH/f<3.0. Therefore,it is favorable for balancing the image quality and the applicationrange by adjusting the field of view and the size of the image surface.Moreover, the following condition can be satisfied: 1.1<ImgH/f<2.7.

When a refractive index of the fourth lens element is N4, the followingcondition is satisfied: 1.20<N4<1.60. Therefore, it is favorable for thefourth lens element with the proper material so as to enhance aberrationcorrections.

When an axial distance between the object-side surface of the first lenselement and the image-side surface of the eighth lens element is TD, acentral thickness of the third lens element is CT3, a central thicknessof the fourth lens element is CT4, a central thickness of the fifth lenselement is CT5, an axial distance between the third lens element and thefourth lens element is T34, and an axial distance between the fourthlens element and the fifth lens element is T45, the following conditionis satisfied: 1.80<TD/(CT3+T34+CT4+T45+CT5)<3.80. Therefore, it isfavorable for adjusting the light path by configuring the lens elementsso as to reduce the total track length.

When a minimum value among Abbe numbers of the lens elements of thephotographing optical lens assembly is Vmin, the following condition issatisfied: 10.0<Vmin<20.0. A lens material with a lower Abbe number isgenerally featured with a better light refracting ability, so thatchromatic aberration and other kinds of aberrations can be corrected byconfiguring the lens material with the lower Abbe number.

The photographing optical lens assembly can further include an aperturestop, which is disposed on the image side of the first lens element.Therefore, it is favorable for balancing the field of view and thevolume by adjusting the position of the aperture stop.

When an axial distance between the aperture stop and the image surfaceis SL, and the axial distance between the object-side surface of thefirst lens element and the image surface is TL, the following conditionis satisfied: 0<SL/TL<1.10. Therefore, the total track length can bereduced by adjusting the position of the aperture stop. Moreover, thefollowing condition can be satisfied: 0.30<SL/TL≤0.86. Therefore, thedesign of the short total track length and the wide field of view can beachieved by further adjusting the position of the aperture stop.Furthermore, the following condition can be satisfied: 0.50<SL/TL≤0.86.

When the focal length of the photographing optical lens assembly is f,the focal length of the first lens element is f1, the focal length ofthe second lens element is f2, the focal length of the third lenselement is f3, the focal length of the fourth lens element is f4, thefocal length of the fifth lens element is f5, the focal length of thesixth lens element is f6, the focal length of the seventh lens elementis f7, and the focal length of the eighth lens element is f8, at leastone of the following conditions is satisfied: −1.50<f/f1<0.55;−0.55<f/f2<1.50; −1.00<f/f3<1.00; −1.50<f/f4<2.00; −1.50<f/f5<1.80;−1.50<f/f6<1.50; −1.50<f/f7<1.50; and −1.50<f/f8<1.00. Therefore, it isfavorable for providing the lens element with the proper strength ofrefractive power so as to avoid excessive aberrations while enlargingthe field of view and reducing the volume. Moreover, at least one of thefollowing conditions can be satisfied: −1.10<f/f1<−0.05; 0.05<f/f2<1.20;−0.70<f/f3<0.80; 0.02 f/f4<1.70; −1.20<f/f5<1.50; −1.10<f/f6<1.20;−0.90<f/f7<1.10; and −1.10<f/f8<0.50.

When the focal length of the photographing optical lens assembly is f,the following condition is satisfied: 0 mm<f<2.4 mm. Therefore, it isfavorable for enlarging the field of view.

When the focal length of the photographing optical lens assembly is f,and the entrance pupil diameter of the photographing optical lensassembly is EPD, the following condition is satisfied: 1.0<f/EPD<2.2.Therefore, it is favorable for providing the aperture stop with theproper size and the proper field of view of the photographing opticallens assembly by adjusting the size of the aperture stop and the focallength of the photographing optical lens assembly.

When an incident angle of a chief ray at the maximum image height on theimage surface of the photographing optical lens assembly is CRA, thefollowing condition is satisfied: 25.0 degrees<CRA<45.0 degrees.Therefore, it is favorable for providing the incident angle with theproper value of the light on the image surface so as to increase theresponse efficiency of an image sensor.

When the maximum image height of the photographing optical lens assemblyis ImgH, the following condition is satisfied: 0.50 mm<ImgH<5.0 mm.Therefore, it is favorable for providing an image sensor with a propersize to the photographing optical lens assembly.

When the vertical distance between the maximum effective diameterposition of the image-side surface of the eighth lens element and theoptical axis is Y82, and the central thickness of the eighth lenselement is CT8, the following condition is satisfied: 3.80<Y82/CT8<15.0.Therefore, it is favorable for the eighth lens element to occupy asmaller volume while correcting aberrations by adjusting the surfaceshape of the eighth lens element.

When the vertical distance between the maximum effective diameterposition of the image-side surface of the eighth lens element and theoptical axis is Y82, and the focal length of the photographing opticallens assembly is f, the following condition is satisfied: 1.0<Y82/f<3.0.Therefore, it is favorable for balancing the field of view and thevolume by adjusting the eighth lens element and the focal length of thephotographing optical lens assembly.

Each of the aforementioned features of the photographing optical lensassembly can be utilized in numerous combinations, so as to achieve thecorresponding functionality.

According to the photographing optical lens assembly of the presentdisclosure, the lens elements of the photographing optical lens assemblycan be made of either glass or plastic material. When the lens elementsare made of glass material, the refractive power distribution of thephotographing optical lens assembly may be more flexible. The glass lenselement can either be made by grinding or molding. When the lenselements are made of plastic material, the manufacturing cost can beeffectively reduced. Furthermore, surfaces of each lens element can bearranged to be aspheric (ASP), which allows for more controllablevariables for eliminating the aberration thereof, the required number ofthe lens elements can be decreased, and the total track length of thephotographing optical lens assembly can be effectively reduced. Theaspheric surfaces may be formed by plastic injection molding or glassmolding.

According to the photographing optical lens assembly of the presentdisclosure, one or more of the lens material may optionally include anadditive which alters the lens transmittance in a specific range ofwavelength for reducing unwanted stray light or color deviation. Forexample, the additive may optionally filter out light in the wavelengthrange of 600 nm˜800 nm for reducing excessive red light and/or nearinfra-red light, or may optionally filter out light in the wavelengthrange of 350 nm˜450 nm to reduce excessive blue light and/or nearultra-violet light from interfering the final image. The additive may behomogenously mixed with a plastic material to be used in manufacturing amixed-material lens element by injection molding.

According to the photographing optical lens assembly of the presentdisclosure, when a surface of a lens element is aspheric, it indicatesthat the complete optical effective area or a partial of the opticaleffective area of the surface of the lens element can be aspheric.

According to the photographing optical lens assembly of the presentdisclosure, each of an object-side surface and an image-side surface ofa lens element has a paraxial region and an off-axis region. Theparaxial region refers to the region of the surface where light raystravel close to the optical axis, and the off-axis region refers to theregion of the surface away from the paraxial region. Particularly unlessotherwise specified, when the lens element has a convex surface, itindicates that the surface can be convex in the paraxial region thereof;when the lens element has a concave surface, it indicates that thesurface can be concave in the paraxial region thereof. According to thephotographing optical lens assembly of the present disclosure, therefractive power of a lens element being positive or negative, or thefocal length of the lens element may refer to the refractive power orthe focal length in the paraxial region of the lens element.

According to the photographing optical lens assembly of the presentdisclosure, an inflection point is defined as a point where curvature isshifted from positive to negative or from negative to positive.

According to the photographing optical lens assembly of the presentdisclosure, a critical point is a non-axial point of the lens surfacewhere its tangent is perpendicular to the optical axis, wherein a convexcritical point is a critical point located on a convex shape of the lenssurface, and a concave critical point is a critical point located on aconcave shape of the lens surface.

According to the photographing optical lens assembly of the presentdisclosure, the image surface, depending on the corresponding imagesensor, can be a planar surface or a curved surface, particularly acurved surface being concave toward the object side. According to thephotographing optical lens assembly of the present disclosure, at leastone image correcting element (such as a field flattener) can beselectively disposed between a lens element closest to the image surfaceand the image surface so as to correct image aberrations (such as thefield curvature). Properties of the image correcting element, such ascurvature, thickness, refractive index, position, surface shape(convex/concave, spherical/aspheric/diffractive/Fresnel etc.) can beadjusted according to the requirements of the imaging apparatus. Ingeneral, the image correcting element is preferably a thin plano-concaveelement having a concave surface facing toward the object side and isdisposed close to the image surface.

According to the photographing optical lens assembly of the presentdisclosure, the photographing optical lens assembly can include at leastone stop. The stop can be a glare stop, a field stop, etc. Therefore,the stray light can be eliminated, and the image quality can beimproved.

According to the photographing optical lens assembly of the presentdisclosure, an aperture stop can be configured as a front stop or amiddle stop. A front stop is disposed between an imaged object and thefirst lens element, and a middle stop is disposed between the first lenselement and the image surface. The front stop can provide a longerdistance between an exit pupil of the photographing optical lensassembly and the image surface to enable a telecentric effect, andthereby can improve the image-sensing efficiency of an image sensor. Themiddle stop is favorable for enlarging the field of view of thephotographing optical lens assembly and thereby provides a wider fieldof view for the same.

According to the photographing optical lens assembly of the presentdisclosure, a variable aperture element can be properly configured. Thevariable aperture element can be a mechanical part or a light controlpart, and the dimension and the shape of the variable aperture elementcan be electrically controlled. The mechanical part can include amoveable component such a blade group or a shielding plate. The lightcontrol part can include a screen component such as a light filter, anelectrochromic material, a liquid crystal layer or the like. The amountof incoming light or the exposure time of the image can be controlled bythe variable aperture element to enhance the image moderation ability.In addition, the variable aperture element can be the aperture stop ofthe photographing optical lens assembly according to the presentdisclosure, so as to moderate the image properties by changing f-numberto control the depth of field or the exposure speed.

According to the photographing optical lens assembly of the presentdisclosure, the photographing optical lens assembly can be applied to 3D(three-dimensional) image capturing applications, in products such asdigital cameras, mobile devices, digital tablets, smart TVs, networkmonitoring devices, motion sensing input devices, driving recorders,rear view camera systems, wearable devices, unmanned aerial vehicles,and other electronic imaging products.

According to the present disclosure, an imaging apparatus is provided.The imaging apparatus includes the aforementioned photographing opticallens assembly according to the present disclosure and an image sensor,wherein the image sensor is disposed on or near the image surface of theaforementioned photographing optical lens assembly. It is favorable forproviding the design of the thin form and the large aperture stop byproperly arranging the surface shapes of the lens elements, so that thephotographing optical lens assembly can be featured with the wide fieldof view to expand the application range, maintain the short total tracklength, and increase the manufacturing and the assembling yield rates.Moreover, the imaging apparatus can further include a barrel member, aholder member or a combination thereof.

According to the present disclosure, an electronic device is provided,wherein the electronic device includes the aforementioned imagingapparatus. Therefore, it is favorable for enhancing the image quality.Moreover, the electronic device can further include, but not limited to,a control unit, a display, a storage unit, a random access memory unit(RAM) or a combination thereof.

According to the above description of the present disclosure, thefollowing 1st-13th specific embodiments are provided for furtherexplanation.

1st Embodiment

FIG. 1 is a schematic view of an imaging apparatus according to the 1stembodiment of the present disclosure. FIG. 2 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 1st embodiment. In FIG. 1, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 196. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 110, a second lens element 120, an aperture stop 100,a third lens element 130, a fourth lens element 140, a fifth lenselement 150, a sixth lens element 160, a seventh lens element 170, aneighth lens element 180, a filter 190 and an image surface 195. Theimage sensor 196 is disposed on the image surface 195 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (110, 120, 130, 140, 150, 160, 170and 180) without additional one or more lens elements inserted betweenthe first lens element 110 and the eighth lens element 180.

The first lens element 110 with negative refractive power has anobject-side surface 111 being concave in a paraxial region thereof andan image-side surface 112 being concave in a paraxial region thereof.The first lens element 110 is made of a plastic material, and has theobject-side surface 111 and the image-side surface 112 being bothaspheric. Furthermore, FIG. 21 shows a schematic view of inflectionpoints according to the 1st embodiment of FIG. 1, and FIG. 22 shows aschematic view of critical points and parameters Y11, Y82, Yc82according to the 1st embodiment of FIG. 1. In FIG. 21 and FIG. 22, theobject-side surface 111 of the first lens element 110 includes at leastone inflection point IP11 and at least one critical point CP11, which isat least one convex critical point, in an off-axis region thereof.

The second lens element 120 with positive refractive power has anobject-side surface 121 being convex in a paraxial region thereof and animage-side surface 122 being concave in a paraxial region thereof. Thesecond lens element 120 is made of a plastic material, and has theobject-side surface 121 and the image-side surface 122 being bothaspheric. Furthermore, the object-side surface 121 of the second lenselement 120 includes at least one inflection point IP21.

The third lens element 130 with positive refractive power has anobject-side surface 131 being convex in a paraxial region thereof and animage-side surface 132 being convex in a paraxial region thereof. Thethird lens element 130 is made of a plastic material, and has theobject-side surface 131 and the image-side surface 132 being bothaspheric. Furthermore, the object-side surface 131 of the third lenselement 130 includes at least one inflection point IP31 and at least onecritical point CP31 in an off-axis region thereof.

The fourth lens element 140 with positive refractive power has anobject-side surface 141 being convex in a paraxial region thereof and animage-side surface 142 being convex in a paraxial region thereof. Thefourth lens element 140 is made of a plastic material, and has theobject-side surface 141 and the image-side surface 142 being bothaspheric. Furthermore, the object-side surface 141 of the fourth lenselement 140 includes at least one inflection point IP41 and at least onecritical point CP41 in an off-axis region thereof. The image-sidesurface 142 of the fourth lens element 140 includes at least oneinflection point IP42.

The fifth lens element 150 with negative refractive power has anobject-side surface 151 being concave in a paraxial region thereof andan image-side surface 152 being convex in a paraxial region thereof. Thefifth lens element 150 is made of a plastic material, and has theobject-side surface 151 and the image-side surface 152 being bothaspheric. Furthermore, the image-side surface 152 of the fifth lenselement 150 includes at least one inflection point IP52 and at least onecritical point CP52 in an off-axis region thereof.

The sixth lens element 160 with positive refractive power has anobject-side surface 161 being convex in a paraxial region thereof and animage-side surface 162 being concave in a paraxial region thereof. Thesixth lens element 160 is made of a plastic material, and has theobject-side surface 161 and the image-side surface 162 being bothaspheric. Furthermore, the object-side surface 161 of the sixth lenselement 160 includes at least one inflection point IP61 and at least onecritical point CP61 in an off-axis region thereof. The image-sidesurface 162 of the sixth lens element 160 includes at least oneinflection point IP62 and at least one critical point CP62 in anoff-axis region thereof.

The seventh lens element 170 with positive refractive power has anobject-side surface 171 being convex in a paraxial region thereof and animage-side surface 172 being concave in a paraxial region thereof. Theseventh lens element 170 is made of a plastic material, and has theobject-side surface 171 and the image-side surface 172 being bothaspheric. Furthermore, the object-side surface 171 of the seventh lenselement 170 includes at least one inflection point IP71 and at least onecritical point CP71 in an off-axis region thereof. The image-sidesurface 172 of the seventh lens element 170 includes at least oneinflection point IP72 and at least one critical point CP72 in anoff-axis region thereof.

The eighth lens element 180 with negative refractive power has anobject-side surface 181 being convex in a paraxial region thereof and animage-side surface 182 being concave in a paraxial region thereof. Theeighth lens element 180 is made of a plastic material, and has theobject-side surface 181 and the image-side surface 182 being bothaspheric. Furthermore, the object-side surface 181 of the eighth lenselement 180 includes at least one inflection point IP81 and at least onecritical point CP81 in an off-axis region thereof. The image-sidesurface 182 of the eighth lens element 180 includes at least oneinflection point IP82 and at least one critical point CP82 in anoff-axis region thereof.

The filter 190 is made of a glass material and located between theeighth lens element 180 and the image surface 195, and will not affectthe focal length of the photographing optical lens assembly.

The equation of the aspheric surface profiles of the aforementioned lenselements of the 1st embodiment is expressed as follows:

${{X(Y)} = {{( {Y^{2}\text{/}R} )\text{/}( {1 + {{sqrt}( {1 - {( {1 + k} ) \times ( {Y\text{/}R} )^{2}}} )}} )} + {\sum\limits_{i}{({Ai}) \times ( Y^{i} )}}}},$where,X is the relative distance between a point on the aspheric surfacespaced at a distance Y from the optical axis and the tangential plane atthe aspheric surface vertex on the optical axis;Y is the vertical distance from the point on the aspheric surface to theoptical axis;R is the curvature radius;k is the conic coefficient; andAi is the i-th aspheric coefficient.

In the photographing optical lens assembly according to the 1stembodiment, when a focal length of the photographing optical lensassembly is f, an f-number of the photographing optical lens assembly isFno, and a half of a maximum field of view of the photographing opticallens assembly is HFOV, these parameters have the following values:f=1.32 mm; Fno=1.80; and HFOV=60.0 degrees.

In the photographing optical lens assembly according to the 1stembodiment, when a refractive index of the fourth lens element 140 isN4, the following condition is satisfied: N4=1.54.

In the photographing optical lens assembly according to the 1stembodiment, when an Abbe number of the first lens element 110 is V1, anAbbe number of the second lens element 120 is V2, an Abbe number of thethird lens element 130 is V3, an Abbe number of the fourth lens element140 is V4, an Abbe number of the fifth lens element 150 is V5, an Abbenumber of the sixth lens element 160 is V6, an Abbe number of theseventh lens element 170 is V7, an Abbe number of the eighth lenselement 180 is V8, and a minimum value among Abbe numbers of the lenselements of the photographing optical lens assembly is Vmin (i.e. aminimum value among V1, V2, V3, V4, V5, V6, V7 and V8, and Vmin=V5 inthe 1st embodiment), the following condition is satisfied: Vmin=19.4.

In the photographing optical lens assembly according to the 1stembodiment, when a central thickness of the sixth lens element 160 isCT6, a central thickness of the seventh lens element 170 is CT7, and acentral thickness of the eighth lens element 180 is CT8, the followingcondition is satisfied: (CT7+CT8)/CT6=1.06.

In the photographing optical lens assembly according to the 1stembodiment, when an axial distance between the first lens element 110and the second lens element 120 is T12, and a central thickness of thesecond lens element 120 is CT2, the following condition is satisfied:T12/CT2=0.35.

In the photographing optical lens assembly according to the 1stembodiment, when the axial distance between the first lens element 110and the second lens element 120 is T12, an axial distance between thesecond lens element 120 and the third lens element 130 is T23, an axialdistance between the third lens element 130 and the fourth lens element140 is T34, an axial distance between the fourth lens element 140 andthe fifth lens element 150 is T45, an axial distance between the fifthlens element 150 and the sixth lens element 160 is T56, an axialdistance between the sixth lens element 160 and the seventh lens element170 is T67, an axial distance between the seventh lens element 170 andthe eighth lens element 180 is T78, and an average value of axialdistances between every adjacent lens elements of the photographingoptical lens assembly is Tavg, i.e.Tavg=(T12+T23+T34+T45+T56+T67+T78)/7, the following condition issatisfied: T56/Tavg=0.07.

In the photographing optical lens assembly according to the 1stembodiment, when an axial distance between the object-side surface 111of the first lens element 110 and the image-side surface 182 of theeighth lens element 180 is TD, a central thickness of the third lenselement 130 is CT3, a central thickness of the fourth lens element 140is CT4, a central thickness of the fifth lens element 150 is CT5, theaxial distance between the third lens element 130 and the fourth lenselement 140 is T34, and the axial distance between the fourth lenselement 140 and the fifth lens element 150 is T45, the followingcondition is satisfied: TD/(CT3+T34+CT4+T45+CT5)=2.58.

In the photographing optical lens assembly according to the 1stembodiment, when an axial distance between the aperture stop 100 and theimage surface 195 is SL, an axial distance between the object-sidesurface 111 of the first lens element 110 and the image surface 195 isTL, an entrance pupil diameter of the photographing optical lensassembly is EPD, the focal length of the photographing optical lensassembly is f, and a maximum image height of the photographing opticallens assembly is ImgH, the following conditions are satisfied:SL/TL=0.68; TL=4.40 mm; TL/EPD=5.98; TL/f=3.32; TL/ImgH=2.00;f/EPD=1.80; ImgH=2.20 mm; and ImgH/f=1.66.

In the photographing optical lens assembly according to the 1stembodiment, when a curvature radius of the object-side surface 111 ofthe first lens element 110 is R1, a curvature radius of the image-sidesurface 112 of the first lens element 110 is R2, and the focal length ofthe photographing optical lens assembly is f, the following conditionsare satisfied: (R1+R2)/(R1−R2)=−0.58; and f/|R1|=0.75.

In the photographing optical lens assembly according to the 1stembodiment, when the focal length of the photographing optical lensassembly is f, a focal length of the first lens element 110 is f1, afocal length of the second lens element 120 is f2, a focal length of thethird lens element 130 is f3, a focal length of the fourth lens element140 is f4, a focal length of the fifth lens element 150 is f5, a focallength of the sixth lens element 160 is f6, a focal length of theseventh lens element 170 is f7, a focal length of the eighth lenselement 180 is f8, and a maximum value among |f/f1|, |f/f2|, |f/f3|,|f/f4|, |f/f5|, |f/f6|, |f/f7| and |f/f8| is |P|max (|P|max=|f/f5| inthe 1st embodiment), the following conditions are satisfied: f/f1=−0.51;f/f2=0.24; f/f3=0.58; f/f4=0.75; f/f5=−0.93; f/f6=0.43; f/f7=0.32;f/f8=−0.09; and |P|max=0.93.

In the photographing optical lens assembly according to the 1stembodiment, when the focal length of the photographing optical lensassembly is f, a composite focal length of the first lens element 110and the second lens element 120 is f12, and a composite focal length ofthe first lens element 110, the second lens element 120 and the thirdlens element 130 is f123, the following conditions are satisfied:f/f12=−0.27; and f/f123=0.44.

FIG. 23 shows a schematic view of the parameter CRA according to the 1stembodiment of FIG. 1. In FIG. 23, when an incident angle of a chief rayat the maximum image height on the image surface 195 of thephotographing optical lens assembly is CRA, the following condition issatisfied: CRA=30.5 degrees.

In FIG. 22, when a vertical distance between a maximum effectivediameter position of the object-side surface 111 of the first lenselement 110 and the optical axis is Y11, a vertical distance between amaximum effective diameter position of the image-side surface 182 of theeighth lens element 180 and the optical axis is Y82, the centralthickness of the eighth lens element 180 is CT8, the focal length of thephotographing optical lens assembly is f, a vertical distance betweenthe critical point CP82 in the off-axis region on the image-side surface182 of the eighth lens element 180 and the optical axis is Yc82, thefollowing conditions are satisfied: Y11/Y82=0.94; Y82/CT8=9.84;Y82/f=1.51; and Yc82/Y82=0.58.

The detailed optical data of the 1st embodiment are shown in TABLE 1 andthe aspheric surface data are shown in TABLE 2 below.

TABLE 1 1st Embodiment f = 1.32 mm, Fno = 1.80, HFOV = 60.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 −1.755 ASP 0.361 Plastic 1.525 58.0 −2.61 26.634 ASP 0.167 3 Lens 2 1.574 ASP 0.475 Plastic 1.639 23.2 5.52 4 2.506ASP 0.419 5 Ape. Stop Plano −0.001  6 Lens 3 2.775 ASP 0.379 Plastic1.544 56.0 2.28 7 −2.130 ASP 0.140 8 Lens 4 11.544 ASP 0.573 Plastic1.544 56.0 1.78 9 −1.037 ASP 0.135 10 Lens 5 −0.365 ASP 0.224 Plastic1.669 19.4 −1.43 11 −0.734 ASP 0.010 12 Lens 6 0.826 ASP 0.369 Plastic1.544 56.0 3.05 13 1.385 ASP 0.064 14 Lens 7 1.099 ASP 0.188 Plastic1.544 56.0 4.13 15 2.022 ASP 0.033 16 Lens 8 0.776 ASP 0.204 Plastic1.525 58.0 −14.34 17 0.640 ASP 0.350 18 Filter Plano 0.110 Glass 1.51764.2 — 19 Plano 0.199 20 Image Plano — Reference wavelength is 587.6 nm(d-line).

TABLE 2 Aspheric Coefficients Surface # 1 2 3 4 6 7 8 9 k = −1.2701E+011.7624E+01 −3.4765E+00 −1.1010E+01   1.1722E+01 −8.3672E+01  9.0000E+01−1.0398E+00 A4 =  1.7908E−01 9.7363E−02 −1.8447E−01 2.4205E−01−1.5448E−01 −1.3364E+00 −3.8069E−01  1.9961E−01 A6 = −1.1544E−015.5692E−01  1.1999E+00 5.4685E−01  3.8042E−02  4.3992E+00 −8.3906E−01−2.7223E+00 A8 =  5.4239E−02 −1.0787E+00  −2.4851E+00 −1.7353E+00 −4.0552E+00 −1.7979E+01  2.3329E+00  1.1085E+01 A10 = −1.5813E−029.9959E−01  2.8668E+00 3.5037E+00  1.3043E+01  4.0853E+01 −5.7435E+00−2.7227E+01 A12 =  2.6119E−03 −4.6322E−01  −1.7181E+00 −1.4665E+00 −3.0901E+01 −4.3794E+01  1.2202E+01  3.1613E+01 A14 = −1.7990E−048.6843E−02  4.0162E−01 2.8336E−01 −8.2589E+00 −1.3260E+01 Surface # 1011 12 13 14 15 16 17 k = −2.8846E+00 −9.7583E−01 −9.1911E+00 −7.7191E−01−2.2984E+01 −9.0000E+01 −5.0570E+00 −3.1464E+00 A4 = −2.9211E−01 6.1633E−01  1.6590E−01  1.5556E−01  8.6346E−01  3.2018E−01 −1.9054E−01−2.0561E−01 A6 =  1.2726E+00 −1.9001E−01 −5.9776E−01 −1.9203E+00−3.1760E+00 −2.7506E−01  1.5336E−01  5.7775E−02 A8 =  2.7402E+00 1.2288E+00  1.0347E+00  3.3479E+00  4.4589E+00 −4.9454E−02 −1.1769E−01−1.7788E−02 A10 = −2.1871E+01 −3.6564E+00 −1.1771E+00 −2.8230E+00−3.2367E+00  1.9316E−01  7.3640E−02  2.0568E−02 A12 =  4.3372E+01 3.9880E+00  7.0834E−01  1.2494E+00  1.2724E+00 −1.1664E−01 −3.0249E−02−1.0568E−02 A14 = −4.0677E+01 −1.8660E+00 −2.0439E−01 −2.7728E−01−2.5653E−01  2.9349E−02  6.5013E−03  2.2048E−03 A16 =  1.5652E+01 3.1230E−01  2.2453E−02  2.4303E−02  2.0767E−02 −2.7058E−03 −5.4176E−04−1.6456E−04

In TABLE 1, the curvature radius, the thickness and the focal length areshown in millimeters (mm). Surface numbers 0-20 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In TABLE 2, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A16 represent the asphericcoefficients ranging from the 4th order to the 16th order. The tablespresented below for each embodiment are the corresponding schematicparameter and aberration curves, and the definitions of the tables arethe same as TABLE 1 and TABLE 2 of the 1st embodiment. Therefore, anexplanation in this regard will not be provided again.

In the photographing optical lens assembly according to the 1stembodiment, eight lens elements (110, 120, 130, 140, 150, 160, 170 and180) are made of plastic materials. At least one surface of theobject-side surface and the image-side surface of each lens element ofthe aforementioned eight lens elements is aspheric and includes at leastone inflection point. The Abbe number V5 of the fifth lens element 150is the minimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 1st embodiment are listed below.

1st Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object−side surface 1 1 1 2 0 3 3 2Image−side surface 0 0 0 1 1 3 3 1

1st Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 0 1 1 0 1 1 1Image-side surface 0 0 0 0 1 1 1 1

2nd Embodiment

FIG. 3 is a schematic view of an imaging apparatus according to the 2ndembodiment of the present disclosure. FIG. 4 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 2nd embodiment. In FIG. 3, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 296. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 210, an aperture stop 200, a second lens element 220,a third lens element 230, a fourth lens element 240, a fifth lenselement 250, a sixth lens element 260, a seventh lens element 270, aneighth lens element 280 and an image surface 295. The image sensor 296is disposed on the image surface 295 of the photographing optical lensassembly. The photographing optical lens assembly includes eight lenselements (210, 220, 230, 240, 250, 260, 270 and 280) without additionalone or more lens elements inserted between the first lens element 210and the eighth lens element 280.

The first lens element 210 with negative refractive power has anobject-side surface 211 being convex in a paraxial region thereof and animage-side surface 212 being concave in a paraxial region thereof. Thefirst lens element 210 is made of a glass material, and has theobject-side surface 211 and the image-side surface 212 being bothaspheric. Furthermore, the object-side surface 211 of the first lenselement 210 includes at least one inflection point.

The second lens element 220 with positive refractive power has anobject-side surface 221 being convex in a paraxial region thereof and animage-side surface 222 being convex in a paraxial region thereof. Thesecond lens element 220 is made of a plastic material, and has theobject-side surface 221 and the image-side surface 222 being bothaspheric. Furthermore, the object-side surface 221 of the second lenselement 220 includes at least one inflection point.

The third lens element 230 with negative refractive power has anobject-side surface 231 being concave in a paraxial region thereof andan image-side surface 232 being concave in a paraxial region thereof.The third lens element 230 is made of a plastic material, and has theobject-side surface 231 and the image-side surface 232 being bothaspheric. Furthermore, the object-side surface 231 of the third lenselement 230 includes at least one inflection point. The image-sidesurface 232 of the third lens element 230 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The fourth lens element 240 with negative refractive power has anobject-side surface 241 being convex in a paraxial region thereof and animage-side surface 242 being concave in a paraxial region thereof. Thefourth lens element 240 is made of a plastic material, and has theobject-side surface 241 and the image-side surface 242 being bothaspheric. Furthermore, the object-side surface 241 of the fourth lenselement 240 includes at least one inflection point. The image-sidesurface 242 of the fourth lens element 240 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The fifth lens element 250 with positive refractive power has anobject-side surface 251 being convex in a paraxial region thereof and animage-side surface 252 being convex in a paraxial region thereof. Thefifth lens element 250 is made of a plastic material, and has theobject-side surface 251 and the image-side surface 252 being bothaspheric. Furthermore, the object-side surface 251 of the fifth lenselement 250 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 252of the fifth lens element 250 includes at least one inflection point.

The sixth lens element 260 with negative refractive power has anobject-side surface 261 being convex in a paraxial region thereof and animage-side surface 262 being concave in a paraxial region thereof. Thesixth lens element 260 is made of a plastic material, and has theobject-side surface 261 and the image-side surface 262 being bothaspheric. Furthermore, the object-side surface 261 of the sixth lenselement 260 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 262of the sixth lens element 260 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The seventh lens element 270 with negative refractive power has anobject-side surface 271 being convex in a paraxial region thereof and animage-side surface 272 being concave in a paraxial region thereof. Theseventh lens element 270 is made of a plastic material, and has theobject-side surface 271 and the image-side surface 272 being bothaspheric. Furthermore, the object-side surface 271 of the seventh lenselement 270 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 272of the seventh lens element 270 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 280 with negative refractive power has anobject-side surface 281 being concave in a paraxial region thereof andan image-side surface 282 being concave in a paraxial region thereof.The eighth lens element 280 is made of a plastic material, and has theobject-side surface 281 being spherical and the image-side surface 282being aspheric. Furthermore, the image-side surface 282 of the eighthlens element 280 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The detailed optical data of the 2nd embodiment are shown in TABLE 3 andthe aspheric surface data are shown in TABLE 4 below.

TABLE 3 2nd Embodiment f = 2.21 mm, Fno = 1.84, HFOV= 57.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 198.550 ASP 0.308 Glass 1.518 63.5 −4.02 2 2.057ASP 0.751 3 Ape. Stop Plano −0.063  4 Lens 2 3.157 ASP 0.997 Plastic1.544 56.0 2.64 5 −2.339 ASP 0.169 6 Lens 3 −200.000 ASP 0.162 Plastic1.614 26.0 −5.40 7 3.374 ASP 0.099 8 Lens 4 2.278 ASP 0.526 Plastic1.544 56.0 −110.15 9 2.016 ASP 0.202 10 Lens 5 5.429 ASP 1.051 Plastic1.544 56.0 1.80 11 −1.113 ASP 0.100 12 Lens 6 1.862 ASP 0.455 Plastic1.680 18.4 −3.40 13 0.930 ASP 0.179 14 Lens 7 2.167 ASP 0.314 Plastic1.544 56.0 −110.40 15 1.985 ASP 0.304 16 Lens 8 −200.000 0.202 Plastic1.544 56.0 −183.78 17 200.000 ASP 0.576 18 Image Plano — Referencewavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 1 2 4 5 6 7 8 9 k = −3.3817E+00−2.2545E+01  3.6586E+00  3.1083E+00  9.0000E+01 −1.0000E+00 −3.2634E+01−1.7402E+01 A4 =  2.5358E−01  6.8983E−01 −9.4666E−03 −1.0109E−01−5.6068E−02 −8.5585E−02 −1.0473E−01 −1.0669E−01 A6 = −2.2741E−01−7.4658E−01 −3.5426E−04 −2.7290E−02 −6.0580E−01 −1.3182E−01  1.7615E−01 2.9689E−02 A8 =  1.8841E−01  1.0686E+00 −1.7383E−01  1.7488E−01 1.1044E+00  2.5613E−01 −2.6127E−01 −8.1464E−03 A10 = −1.1458E−01−8.3074E−01  3.2511E−01 −3.5417E−01 −1.0876E+00 −2.0083E−01  2.4616E−01−1.8002E−02 A12 =  4.1956E−02  3.3590E−01 −3.9214E−01  3.0770E−01 4.6624E−01  8.2154E−02 −1.2833E−01  1.3836E−02 A14 = −8.4305E−03−6.0503E−02  6.7974E−02 −1.1307E−01 −4.5302E−02 −1.3585E−02  3.4836E−02−2.9673E−03 A16 =  7.2362E−04 −3.8741E−03  1.7187E−04 Surface # 10 11 1213 14 15 17 k = 3.7251E+00 −1.6220E+00 −1.1502E+00 −1.0371E+00−8.0166E+00 −1.8781E+01 −9.0000E+01 A4 = 1.9885E−02  1.4422E−01−1.6823E−01 −3.9620E−01  8.4549E−02  3.6949E−02  6.3729E−02 A6 =−6.3285E−02  −2.0207E−01 −3.6261E−02  2.4864E−01 −1.1196E−01 −3.2997E−02−6.1975E−02 A8 = 7.1849E−02  2.4993E−01  1.1129E−01 −1.1408E−01 7.0612E−02  1.0318E−02  2.7116E−02 A10 = −4.3604E−02  −2.2508E−01−8.3144E−02  3.7468E−02 −2.8178E−02 −1.9984E−03 −6.2946E−03 A12 =1.5264E−02  1.5802E−01  3.1506E−02 −9.3946E−03  7.1313E−03  2.6279E−04 8.0891E−04 A14 = −2.9237E−03  −7.6018E−02 −6.9221E−03  1.8012E−03−1.1288E−03 −2.0197E−05 −5.4746E−05 A16 = 2.2321E−04  2.2363E−02 8.9863E−04 −2.4071E−04  1.0831 E−04  6.4775E−07  1.5265E−06 A18 =−3.6002E−03 −6.3069E−05  1.9072E−05 −5.7790E−06 A20 =  2.4311E−04 1.7970E−06 −6.5673E−07  1.3211E−07

In the 2nd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of, these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 2nd embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 3 and TABLE 4 asthe following values and satisfy the following conditions:

2nd Embodiment f [mm] 2.21 Fno 1.84 HFOV [deg.] 57.0 N4 1.54 Vmin 18.4(CT7 + CT8)/CT6 1.13 SL/TL 0.83 T12/CT2 0.69 T56/Tavg 0.40 TD/(CT3 +T34 + CT4 + T45 + CT5) 2.82 TL [mm] 6.33 TL/EPD 5.28 TL/f 2.87 TL/ImgH2.06 (R1 + R2)/(R1 − R2) 1.02 f/EPD 1.84 f/f1 −0.55 f/f2 0.84 f/f3 −0.41f/f4 −0.02 f/f5 1.23 f/f6 −0.65 f/f7 −0.02 f/f8 −0.01 f/f12 0.51 f/f1230.05 f/|R1| 0.01 |P|max 1.23 CRA [deg.] 30.9 ImgH [mm] 3.08 ImgH/f 1.40Y11/Y82 0.50 Y82/CT8 14.04 Y82/f 1.28 Yc82/Y82 0.84

In the photographing optical lens assembly according to the 2ndembodiment, seven lens elements (220, 230, 240, 250, 260, 270 and 280)are made of plastic materials. At least one surface of the object-sidesurface and the image-side surface of each lens element of theaforementioned seven lens elements is aspheric and includes at least oneinflection point. The Abbe number of the sixth lens element 260 is theminimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 2nd embodiment are listed below.

2nd Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 1 2 1 1 3 0Image-side surface 0 0 2 2 2 1 3 3

2nd Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 0 0 1 1 1 0Image-side surface 0 0 2 1 0 1 2 1

3rd Embodiment

FIG. 5 is a schematic view of an imaging apparatus according to the 3rdembodiment of the present disclosure. FIG. 6 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 3rd embodiment. In FIG. 5, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 396. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 310, an aperture stop 300, a second lens element 320,a third lens element 330, a fourth lens element 340, a fifth lenselement 350, a sixth lens element 360, a seventh lens element 370, aneighth lens element 380, a filter 390 and an image surface 395. Theimage sensor 396 is disposed on the image surface 395 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (310, 320, 330, 340, 350, 360, 370and 380) without additional one or more lens elements inserted betweenthe first lens element 310 and the eighth lens element 380.

The first lens element 310 with negative refractive power has anobject-side surface 311 being convex in a paraxial region thereof and animage-side surface 312 being concave in a paraxial region thereof. Thefirst lens element 310 is made of a plastic material, and has theobject-side surface 311 and the image-side surface 312 being bothaspheric. Furthermore, the object-side surface 311 of the first lenselement 310 includes at least one inflection point.

The second lens element 320 with positive refractive power has anobject-side surface 321 being convex in a paraxial region thereof and animage-side surface 322 being convex in a paraxial region thereof. Thesecond lens element 320 is made of a glass material, and has theobject-side surface 321 and the image-side surface 322 being bothaspheric. Furthermore, the object-side surface 321 of the second lenselement 320 includes at least one inflection point.

The third lens element 330 with negative refractive power has anobject-side surface 331 being convex in a paraxial region thereof and animage-side surface 332 being concave in a paraxial region thereof. Thethird lens element 330 is made of a plastic material, and has theobject-side surface 331 and the image-side surface 332 being bothaspheric. Furthermore, the object-side surface 331 of the third lenselement 330 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 332of the third lens element 330 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The fourth lens element 340 with positive refractive power has anobject-side surface 341 being convex in a paraxial region thereof and animage-side surface 342 being concave in a paraxial region thereof. Thefourth lens element 340 is made of a plastic material, and has theobject-side surface 341 and the image-side surface 342 being bothaspheric. Furthermore, the object-side surface 341 of the fourth lenselement 340 includes at least one inflection point. The image-sidesurface 342 of the fourth lens element 340 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The fifth lens element 350 with positive refractive power has anobject-side surface 351 being convex in a paraxial region thereof and animage-side surface 352 being convex in a paraxial region thereof. Thefifth lens element 350 is made of a plastic material, and has theobject-side surface 351 and the image-side surface 352 being bothaspheric. Furthermore, the object-side surface 351 of the fifth lenselement 350 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 352of the fifth lens element 350 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The sixth lens element 360 with negative refractive power has anobject-side surface 361 being convex in a paraxial region thereof and animage-side surface 362 being concave in a paraxial region thereof. Thesixth lens element 360 is made of a plastic material, and has theobject-side surface 361 and the image-side surface 362 being bothaspheric. Furthermore, the object-side surface 361 of the sixth lenselement 360 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 362of the sixth lens element 360 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The seventh lens element 370 with positive refractive power has anobject-side surface 371 being convex in a paraxial region thereof and animage-side surface 372 being concave in a paraxial region thereof. Theseventh lens element 370 is made of a plastic material, and has theobject-side surface 371 and the image-side surface 372 being bothaspheric. Furthermore, the object-side surface 371 of the seventh lenselement 370 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 372of the seventh lens element 370 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 380 with positive refractive power has anobject-side surface 381 being convex in a paraxial region thereof and animage-side surface 382 being concave in a paraxial region thereof. Theeighth lens element 380 is made of a plastic material, and has theobject-side surface 381 and the image-side surface 382 being bothaspheric. Furthermore, the image-side surface 382 of the eighth lenselement 380 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The filter 390 is made of a glass material and located between theeighth lens element 380 and the image surface 395, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 3rd embodiment are shown in TABLE 5 andthe aspheric surface data are shown in TABLE 6 below.

TABLE 5 3rd Embodiment f = 1.85 mm, Fno = 1.75, HFOV = 62.9 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 14.529 ASP 0.251 Plastic 1.545 56.1 −2.59 21.278 ASP 0.546 3 Ape. Stop Plano −0.052  4 Lens 2 2.934 ASP 0.945 Glass1.610 57.9 2.28 5 −2.325 ASP 0.261 6 Lens 3 5.926 ASP 0.138 Plastic1.639 23.5 −6.48 7 2.415 ASP 0.046 8 Lens 4 1.869 ASP 0.558 Plastic1.544 56.0 75.04 9 1.753 ASP 0.154 10 Lens 5 4.311 ASP 0.863 Plastic1.544 56.0 1.77 11 −1.150 ASP 0.100 12 Lens 6 1.079 ASP 0.300 Plastic1.688 18.7 −2.67 13 0.603 ASP 0.228 14 Lens 7 1.511 ASP 0.367 Plastic1.544 56.0 5.13 15 3.016 ASP 0.151 16 Lens 8 40.268 ASP 0.278 Plastic1.544 56.0 92.52 17 200.839 ASP 0.250 18 Filter Plano 0.080 Glass 1.51764.2 — 19 Plano 0.223 20 Image Plano — Reference wavelength is 587.6 nm(d-line).

TABLE 6 Aspheric Coefficients Surface # 1 2 4 5 6 7 8 9 k = −2.1480E+01−9.0518E+00 2.6994E+00  8.4943E−01 2.5057E+01 −1.0000E+00 −2.8438E+01−1.3092E+01 A4 =  2.9122E−01  9.9644E−01 −1.0115E−02  −1.5472E−016.4127E−02  1.2784E−02 −6.3377E−02 −1.3342E−01 A6 = −3.9749E−01−1.2550E+00 1.1088E−02 −1.0299E−01 −1.3075E+00  −7.7902E−01 −1.2064E−01 2.7583E−02 A8 =  3.8056E−01  2.0464E+00 −3.7912E−01   3.7390E−012.2082E+00  1.4141E+00  2.5126E−01 −8.4024E−02 A10 = −2.6901E−01−1.9002E+00 8.5051E−01 −8.3933E−01 −2.0227E+00  −1.2551E+00 −9.6077E−02 5.3845E−02 A12 =  1.1971E−01  9.5837E−01 −1.1188E+00   8.7790E−016.0539E−01  5.8011E−01 −6.3727E−02 −8.5831E−03 A14 = −2.9104E−02−2.0887E−01 2.3467E−01 −3.9033E−01 1.0239E−01 −1.0958E−01  6.0129E−02A16 =  3.0227E−03 −1.3381E−02 Surface # 10 11 12 13 14 15 16 17 k =−1.5023E+00 −1.6513E+00 −1.5711E+00 −1.0764E+00 −5.4001E+00 −4.5285E+01−9.0000E+01 −9.0000E+01 A4 =  4.5136E−02  2.3724E−01 −3.1706E−01−7.6967E−01  3.1471E−01  1.9069E−01  1.4828E−01 A6 = −9.7941E−02−3.9449E−01  4.7918E−02  6.0699E−01 −1.0631E+00 −6.7796E−01 −2.0836E−01A8 =  6.1445E−02  4.5595E−01  5.7278E−02 −3.3553E−01  1.4026E+00 9.1909E−01  1.2540E−01 A10 = −1.3520E−02 −3.3603E−01 −4.9801E−02 1.3176E−01 −1.0028E+00 −6.4480E−01 −4.0898E−02 A12 =  2.6971E−04 2.0823E−01  1.5149E−02 −3.9043E−02  4.2449E−01  2.6141E−01  7.7850E−03A14 = −1.1063E−01 −1.8985E−03  9.0856E−03 −1.0959E−01 −6.3907E−02−8.6846E−04 A16 =  4.0910E−02  8.0788E−05 −1.5694E−03  1.6957E−02 9.3282E−03  5.2846E−05 A18 = −8.5961E−03  1.6951E−04 −1.4455E−03−7.5059E−04 −1.3593E−06 A20 =  7.5875E−04 −8.1663E−06  5.2214E−05 2.5670E−05

In the 3rd embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 3rd embodiment, so an explanation in thisregard will not be provided again. Furthermore, three values ofparameter Yc82/Y82 in the following table are respectively correspondingto three critical points located from the axial vertex to the maximumeffective diameter position in the off-axis region of the image-sidesurface 382 of the eighth lens element 380.

Moreover, these parameters can be calculated from TABLE 5 and TABLE 6 asthe following values and satisfy the following conditions:

3rd Embodiment f [mm] 1.85 Fno 1.75 HFOV [deg.] 62.9 N4 1.54 Vmin 18.7(CT7 + CT8)/CT6 2.15 SL/TL 0.86 T12/CT2 0.52 T56/Tavg 0.49 TD/(CT3 +T34 + CT4 + T45 + CT5) 2.92 TL [mm] 5.69 TL/EPD 5.39 TL/f 3.08 TL/ImgH2.03 (R1 + R2)/(R1 − R2) 1.19 f/EPD 1.75 f/f1 −0.71 f/f2 0.81 f/f3 −0.28f/f4 0.02 f/f5 1.04 f/f6 −0.69 f/f7 0.36 f/f8 0.02 f/f12 0.36 f/f1230.02 f/|R1| 0.13 |P|max 1.04 CRA [deg.] 33.2 ImgH [mm] 2.80 ImgH/f 1.52Y11/Y82 0.46 Y82/CT8 9.19 Y82/f 1.38 Yc82/Y82 0.43, 0.60, 0.76

In the photographing optical lens assembly according to the 3rdembodiment, seven lens elements (310, 330, 340, 350, 360, 370 and 380)are made of plastic materials. At least one surface of the object-sidesurface and the image-side surface of each lens element of theaforementioned seven lens elements is aspheric and includes at least oneinflection point. The Abbe number of the sixth lens element 360 is theminimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 3rd embodiment are listed below.

3rd Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 1 3 1 1 3 0Image-side surface 0 0 2 2 2 1 5 4

3rd Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 1 0 1 1 1 0Image-side surface 0 0 2 1 2 1 1 3

4th Embodiment

FIG. 7 is a schematic view of an imaging apparatus according to the 4thembodiment of the present disclosure. FIG. 8 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 4th embodiment. In FIG. 7, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 496. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 410, a stop 401, a second lens element 420, anaperture stop 400, a third lens element 430, a stop 402, a fourth lenselement 440, a fifth lens element 450, a sixth lens element 460, aseventh lens element 470, an eighth lens element 480, a filter 490 andan image surface 495. The image sensor 496 is disposed on the imagesurface 495 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (410,420, 430, 440, 450, 460, 470 and 480) without additional one or morelens elements inserted between the first lens element 410 and the eighthlens element 480.

The first lens element 410 with negative refractive power has anobject-side surface 411 being concave in a paraxial region thereof andan image-side surface 412 being concave in a paraxial region thereof.The first lens element 410 is made of a plastic material, and has theobject-side surface 411 and the image-side surface 412 being bothaspheric. Furthermore, the object-side surface 411 of the first lenselement 410 includes at least one inflection point and at least oneconvex critical point in an off-axis region thereof. The image-sidesurface 412 of the first lens element 410 includes at least oneinflection point.

The second lens element 420 with negative refractive power has anobject-side surface 421 being convex in a paraxial region thereof and animage-side surface 422 being concave in a paraxial region thereof. Thesecond lens element 420 is made of a plastic material, and has theobject-side surface 421 and the image-side surface 422 being bothaspheric. Furthermore, the object-side surface 421 of the second lenselement 420 includes at least one inflection point.

The third lens element 430 with positive refractive power has anobject-side surface 431 being concave in a paraxial region thereof andan image-side surface 432 being convex in a paraxial region thereof. Thethird lens element 430 is made of a plastic material, and has theobject-side surface 431 and the image-side surface 432 being bothaspheric.

The fourth lens element 440 with positive refractive power has anobject-side surface 441 being convex in a paraxial region thereof and animage-side surface 442 being convex in a paraxial region thereof. Thefourth lens element 440 is made of a plastic material, and has theobject-side surface 441 and the image-side surface 442 being bothaspheric. Furthermore, the object-side surface 441 of the fourth lenselement 440 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The fifth lens element 450 with positive refractive power has anobject-side surface 451 being concave in a paraxial region thereof andan image-side surface 452 being convex in a paraxial region thereof. Thefifth lens element 450 is made of a plastic material, and has theobject-side surface 451 and the image-side surface 452 being bothaspheric. Furthermore, the object-side surface 451 of the fifth lenselement 450 includes at least one inflection point.

The sixth lens element 460 with positive refractive power has anobject-side surface 461 being concave in a paraxial region thereof andan image-side surface 462 being convex in a paraxial region thereof. Thesixth lens element 460 is made of a plastic material, and has theobject-side surface 461 and the image-side surface 462 being bothaspheric. Furthermore, the object-side surface 461 of the sixth lenselement 460 includes at least one inflection point. The image-sidesurface 462 of the sixth lens element 460 includes at least oneinflection point.

The seventh lens element 470 with negative refractive power has anobject-side surface 471 being concave in a paraxial region thereof andan image-side surface 472 being convex in a paraxial region thereof. Theseventh lens element 470 is made of a plastic material, and has theobject-side surface 471 and the image-side surface 472 being bothaspheric. Furthermore, the object-side surface 471 of the seventh lenselement 470 includes at least one inflection point. The image-sidesurface 472 of the seventh lens element 470 includes at least oneinflection point and at least one critical point in an off-axis regionthereof. Moreover, the image-side surface 462 of the sixth lens element460 and the object-side surface 471 of the seventh lens element 470 arelocated adjacent to each other and aspheric cemented. The asphericcoefficients of the image-side surface 462 and the aspheric coefficientsof the object-side surface 471 are different.

The eighth lens element 480 with negative refractive power has anobject-side surface 481 being concave in a paraxial region thereof andan image-side surface 482 being concave in a paraxial region thereof.The eighth lens element 480 is made of a plastic material, and has theobject-side surface 481 and the image-side surface 482 being bothaspheric. Furthermore, the object-side surface 481 of the eighth lenselement 480 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 482of the eighth lens element 480 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 490 is made of a glass material and located between theeighth lens element 480 and the image surface 495, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 4th embodiment are shown in TABLE 7 andthe aspheric surface data are shown in TABLE 8 below.

TABLE 7 4th Embodiment f = 0.73 mm, Fno = 1.70, HFOV = 61.0 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Lens 1 −2.625 ASP 0.314 Plastic 1.545 56.1 −1.44 21.170 ASP 0.697 3 Stop Plano 0.052 4 Lens 2 5.967 ASP 0.150 Plastic1.669 19.4 −36.85 5 4.756 ASP 0.136 6 Ape. Stop Plano 0.062 7 Lens 3−1.937 ASP 0.600 Plastic 1.544 56.0 1.50 8 −0.636 ASP −0.146  9 StopPlano 0.189 10 Lens 4 4.897 ASP 0.424 Plastic 1.544 56.0 3.46 11 −2.962ASP 0.035 12 Lens 5 −1.006 ASP 0.150 Plastic 1.669 19.4 27.54 13 −1.011ASP 0.010 14 Lens 6 −15.223 ASP 1.036 Plastic 1.544 56.0 0.85 15 −0.459ASP 0.030 Cement 1.485 53.2 16 Lens 7 −0.292 ASP 0.150 Plastic 1.66919.4 −2.06 17 −0.447 ASP 0.040 18 Lens 8 −0.705 ASP 0.150 Plastic 1.58428.2 −1.12 19 9.947 ASP 0.300 20 Filter Plano 0.210 Glass 1.517 64.2 —21 Plano 0.132 22 Image Plano — Reference wavelength is 587.6 nm(d-line). Effective radius of Surface 3 is 0.765 mm. Effective radius ofSurface 9 is 0.600 mm.

TABLE 8 Aspheric Coefficients Surface # 1 2 4 5 7 8 10 11 k =−9.0000E+01  0.0000E+00 −1.8305E+00 −9.2965E+00 −8.7644E+01 −1.2552E+00−9.0000E+01 3.9619E−01 A4 =  4.5087E−01  1.0240E+00  5.3295E−01 1.3714E+00 −1.2066E+00 −9.0041E−01 −1.2641E+00 −1.2882E+00  A6 =−4.4954E−01 −1.6651E−01 −4.7647E−01 −3.1440E+00  7.5025E+00  4.6398E+00 5.7629E+00 7.1974E+00 A8 =  2.7989E−01 −2.2267E−01 −4.5979E+00 4.7177E+01 −4.2330E+01 −2.0771E+01 −1.7121E+01 −2.4113E+01  A10 =−1.0667E−01 −1.9899E+00 −2.9138E−02 −3.3691E+02  1.0216E+02  3.7808E+01 2.3888E+01 3.7509E+01 A12 =  2.3174E−02  1.5442E+00  2.1159E+01 1.0593E+03 −2.9870E+01 −1.1908E+01 −2.6300E+01  A14 = −2.1046E−03−1.6342E+01 6.5039E+00 Surface # 12 13 14 15 16 17 18 19 k = −3.2607E+00−2.5448E+00 −9.0000E+01 −1.4917E+00 −2.0179E+00 −6.5858E+00 −2.2255E+01 6.0267E+01 A4 =  1.0113E+00 −3.7604E−02 −1.5230E+00 −3.9324E+00−2.8893E+00 −2.9112E+00 −5.8910E+00 −3.5563E+00 A6 = −3.4038E−01 4.9853E+00  1.0259E+01  1.1920E+01  2.4444E+01  2.6157E+01  4.8475E+01 1.9936E+01 A8 = −5.7190E+00 −2.4415E+01 −3.3627E+01 −8.4093E+01−1.7222E+02 −9.6199E+01 −1.8030E+02 −5.6116E+01 A10 =  5.2898E+00 4.7478E+01  5.5648E+01  5.4713E+02  6.3906E+02  1.9141E+02  3.9006E+02 9.3816E+01 A12 =  6.0847E+00 −4.7715E+01 −4.6456E+01 −1.5342E+03−1.2235E+03 −2.1279E+02 −5.2853E+02 −9.7752E+01 A14 = −6.8847E+00 2.5438E+01  1.8323E+01  1.8687E+03  1.1540E+03  1.2425E+02  4.5711E+02 6.4008E+01 A16 = −5.7154E+00 −2.6902E+00 −8.2450E+02 −4.2392E+02−2.9690E+01 −2.4617E+02 −2.5445E+01 A18 =  7.5487E+01  5.5331E+00 A20 =−1.0098E+01 −4.9229E−01

In the 4th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 4th embodiment, so an explanation in thisregard will not be provided again. Furthermore, two values of parameterYc82/Y82 in the following table are respectively corresponding to twocritical points located from the axial vertex to the maximum effectivediameter position in the off-axis region of the image-side surface 482of the eighth lens element 480.

Moreover, these parameters can be calculated from TABLE 7 and TABLE 8 asthe following values and satisfy the following conditions:

4th Embodiment f [mm] 0.73 Fno 1.70 HFOV [deg.] 61.0 N4 1.54 Vmin 19.4(CT7 + CT8)/CT6 0.29 SL/TL 0.71 T12/CT2 4.99 T56/Tavg 0.06 TD/(CT3 +T34 + CT4 + T45 + CT5) 3.26 TL [mm] 4.72 TL/EPD 11.01 TL/f 6.48 TL/ImgH3.58 (R1 + R2)/(R1 − R2) 0.38 f/EPD 1.70 f/f1 −0.51 f/f2 −0.02 f/f3 0.49f/f4 0.21 f/f5 0.03 f/f6 0.86 f/f7 −0.35 f/f8 −0.65 f/f12 −0.54 f/f1230.49 f/|R1| 0.28 |P|max 0.86 CRA [deg.] 31.7 ImgH [mm] 1.32 ImgH/f 1.81Y11/Y82 1.55 Y82/CT8 6.79 Y82/f 1.40 Yc82/Y82 0.09, 0.73

In the photographing optical lens assembly according to the 4thembodiment, eight lens elements (410, 420, 430, 440, 450, 460, 470 and480) are made of plastic materials. At least one surface of theobject-side surface and the image-side surface of each lens element ofseven lens elements (410, 420, 440, 450, 460, 470 and 480) is asphericand includes at least one inflection point. The Abbe numbers of thesecond lens element 420, the fifth lens element 450 and the seventh lenselement 470 are the minimum values Vmin among Abbe numbers of the lenselements of the photographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 4th embodiment are listed below.

4th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 0 1 2 1 1 1Image-side surface 1 0 0 0 0 3 1 2

4th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 0 0 1 0 0 0 1Image-side surface 0 0 0 0 0 0 1 2

5th Embodiment

FIG. 9 is a schematic view of an imaging apparatus according to the 5thembodiment of the present disclosure. FIG. 10 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 5th embodiment. In FIG. 9, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 596. The photographing opticallens assembly includes, in order from an object side to an image side, astop 501, an aperture stop 500, a first lens element 510, a second lenselement 520, a stop 502, a third lens element 530, a fourth lens element540, a fifth lens element 550, a sixth lens element 560, a seventh lenselement 570, an eighth lens element 580, a filter 590 and an imagesurface 595. The image sensor 596 is disposed on the image surface 595of the photographing optical lens assembly. The photographing opticallens assembly includes eight lens elements (510, 520, 530, 540, 550,560, 570 and 580) without additional one or more lens elements insertedbetween the first lens element 510 and the eighth lens element 580.

The first lens element 510 with negative refractive power has anobject-side surface 511 being convex in a paraxial region thereof and animage-side surface 512 being concave in a paraxial region thereof. Thefirst lens element 510 is made of a plastic material, and has theobject-side surface 511 and the image-side surface 512 being bothaspheric. Furthermore, the object-side surface 511 of the first lenselement 510 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 512of the first lens element 510 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The second lens element 520 with positive refractive power has anobject-side surface 521 being convex in a paraxial region thereof and animage-side surface 522 being concave in a paraxial region thereof. Thesecond lens element 520 is made of a plastic material, and has theobject-side surface 521 and the image-side surface 522 being bothaspheric. Furthermore, the object-side surface 521 of the second lenselement 520 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 522of the second lens element 520 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The third lens element 530 with negative refractive power has anobject-side surface 531 being convex in a paraxial region thereof and animage-side surface 532 being concave in a paraxial region thereof. Thethird lens element 530 is made of a plastic material, and has theobject-side surface 531 and the image-side surface 532 being bothaspheric. Furthermore, the object-side surface 531 of the third lenselement 530 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 532of the third lens element 530 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The fourth lens element 540 with positive refractive power has anobject-side surface 541 being concave in a paraxial region thereof andan image-side surface 542 being convex in a paraxial region thereof. Thefourth lens element 540 is made of a plastic material, and has theobject-side surface 541 and the image-side surface 542 being bothaspheric. Furthermore, the object-side surface 541 of the fourth lenselement 540 includes at least one inflection point. The image-sidesurface 542 of the fourth lens element 540 includes at least oneinflection point.

The fifth lens element 550 with negative refractive power has anobject-side surface 551 being concave in a paraxial region thereof andan image-side surface 552 being concave in a paraxial region thereof.The fifth lens element 550 is made of a plastic material, and has theobject-side surface 551 and the image-side surface 552 being bothaspheric. Furthermore, the object-side surface 551 of the fifth lenselement 550 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 552of the fifth lens element 550 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The sixth lens element 560 with negative refractive power has anobject-side surface 561 being convex in a paraxial region thereof and animage-side surface 562 being concave in a paraxial region thereof. Thesixth lens element 560 is made of a plastic material, and has theobject-side surface 561 and the image-side surface 562 being bothaspheric. Furthermore, the object-side surface 561 of the sixth lenselement 560 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 562of the sixth lens element 560 includes at least one inflection point andat least one critical point in an off-axis region thereof.

The seventh lens element 570 with positive refractive power has anobject-side surface 571 being convex in a paraxial region thereof and animage-side surface 572 being concave in a paraxial region thereof. Theseventh lens element 570 is made of a plastic material, and has theobject-side surface 571 and the image-side surface 572 being bothaspheric. Furthermore, the object-side surface 571 of the seventh lenselement 570 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 572of the seventh lens element 570 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 580 with positive refractive power has anobject-side surface 581 being convex in a paraxial region thereof and animage-side surface 582 being concave in a paraxial region thereof. Theeighth lens element 580 is made of a plastic material, and has theobject-side surface 581 and the image-side surface 582 being bothaspheric. Furthermore, the object-side surface 581 of the eighth lenselement 580 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 582of the eighth lens element 580 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 590 is made of a glass material and located between theeighth lens element 580 and the image surface 595, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 5th embodiment are shown in TABLE 9 andthe aspheric surface data are shown in TABLE 10 below.

TABLE 9 5th Embodiment f = 1.91 mm, Fno = 1.87, HFOV = 61.4 deg. Surface# Curvature Radius Thickness Material Index Abbe # Focal Length 0 ObjectPlano Infinity 1 Stop Plano 0.080 2 Ape. Stop Plano 0.032 3 Lens 114.428 ASP 0.335 Plastic 1.566 37.4 −20.06 4 6.302 ASP 0.030 5 Lens 21.602 ASP 0.268 Plastic 1.544 56.0 3.61 6 8.149 ASP −0.124  7 Stop Plano0.215 8 Lens 3 3.181 ASP 0.150 Plastic 1.660 20.4 −12.11 9 2.233 ASP0.087 10 Lens 4 −2.841 ASP 0.869 Plastic 1.544 56.0 1.41 11 −0.668 ASP0.020 12 Lens 5 −20.314 ASP 0.200 Plastic 1.680 18.4 −4.92 13 4.021 ASP0.020 14 Lens 6 0.738 ASP 0.283 Plastic 1.544 56.0 −4.97 15 0.501 ASP0.288 16 Lens 7 10.077 ASP 0.200 Plastic 1.544 56.0 41.18 17 18.189 ASP0.101 18 Lens 8 2.993 ASP 0.200 Plastic 1.544 56.0 58.11 19 3.229 ASP0.280 20 Filter Plano 0.110 Glass 1.517 64.2 — 21 Plano 0.121 22 ImagePlano — Reference wavelength is 587.6 nm (d-line). Effective radius ofSurface 1 is 0.575 mm. Effective radius of Surface 7 is 0.800 mm.Effective radius of Surface 10 is 1.030 mm.

TABLE 10 Aspheric Coefficients Surface # 3 4 5 6 8 9 10 11 k = 0.0000E+00  5.1674E+01 −4.6407E+01 6.4126E+01 −9.0000E+01 −2.3566E+01−5.7208E+01 −2.0661E+00 A4 = −1.6037E−01 −1.1441E+00  5.5137E−012.6443E−01 −4.4203E−01 −1.5074E−01 −7.2248E−02 −2.4736E−01 A6 =−4.0633E−01 −6.4865E−01 −8.3682E+00 −1.3446E+00  −2.3248E+00 −1.6872E+00 4.4967E−01  1.3017E−01 A8 =  1.1394E+00  2.8435E+00  3.4699E+01−1.5855E+00   4.5330E+00  4.4330E+00 −6.0695E−01  6.9909E−02 A10 =−4.9458E+00 −8.7455E−01 −1.2021E+02 7.2333E+00 −1.0115E+00 −4.4450E+00 3.6238E−01 −2.6440E−01 A12 = −7.9114E+00  2.5954E+02 −1.1188E+01 −2.1853E+00  1.8916E+00 −1.0476E−01  4.2020E−01 A14 = −2.5800E+025.5459E+00  1.0183E+00 −2.8774E−01  1.1550E−02 −2.3423E−01 A16 = 4.1233E−02 Surface # 12 13 14 15 16 17 18 19 k = −9.0000E+01 2.8912E−01−2.2681E+00 −2.3216E+00  1.5406E+01  3.7723E+01 −3.3203E+01 −5.7933E+00A4 =  1.9467E−01 2.3585E−01 −3.1699E−01 −3.3984E−01 −2.1511E−01−4.1480E−01  4.8928E−01  5.2533E−01 A6 = −1.0880E−02 −2.2680E−01  3.0171E−01  2.4191E−01  1.1333E+00  1.8400E+00 −7.5749E−01 −9.2949E−01A8 = −1.3883E−01 9.3228E−02 −2.3188E−01  2.1659E−01 −1.3339E+00−2.5337E+00  4.7814E−01  6.6598E−01 A10 =  9.5830E−02 −2.6454E−02  1.0865E−01 −4.9599E−01  7.0036E−01  1.7860E+00 −1.5307E−01 −2.4984E−01A12 = −2.7409E−02 6.2721E−03 −2.7927E−02  3.3941E−01 −1.8893E−01−7.3945E−01  2.5179E−02  5.1277E−02 A14 =  2.9745E−03 −1.0196E−03  3.6359E−03 −1.1643E−01  2.4910E−02  1.8728E−01 −1.8800E−03 −5.4383E−03A16 = −4.4182E−05 6.9638E−05 −1.8746E−04  2.1702E−02 −8.7180E−04−2.8600E−02  3.9277E−05  2.3280E−04 A18 = −2.0980E−03 −1.2173E−04 2.4245E−03 A20 =  8.2338E−05  9.5155E−06 −8.7874E−05

In the 5th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 5th embodiment, so an explanation in thisregard will not be provided again. Furthermore, three values ofparameter Yc82/Y82 in the following table are respectively correspondingto three critical points located from the axial vertex to the maximumeffective diameter position in the off-axis region of the image-sidesurface 582 of the eighth lens element 580.

Moreover, these parameters can be calculated from TABLE 9 and TABLE 10as the following values and satisfy the following conditions:

5th Embodiment f [mm] 1.91 Fno 1.87 HFOV [deg.] 61.4 N4 1.54 Vmin 18.4(CT7 + CT8)/CT6 1.41 SL/TL 1.01 T12/CT2 0.11 T56/Tavg 0.22 TD/(CT3 +T34 + CT4 + T45 + CT5) 2.37 TL [mm] 3.65 TL/EPD 3.57 TL/f 1.91 TL/ImgH1.60 (R1 + R2)/(R1 − R2) 2.55 f/EPD 1.87 f/f1 −0.10 f/f2 0.53 f/f3 −0.16f/f4 1.36 f/f5 −0.39 f/f6 −0.39 f/f7 0.05 f/f8 0.03 f/f12 0.43 f/f1230.30 f/|R1| 0.13 |P|max 1.36 CRA [deg.] 21.5 ImgH [mm] 2.29 ImgH/f 1.19Y11/Y82 0.23 Y82/CT8 11.24 Y82/f 1.17 Yc82/Y82 0.74, 0.88, 1.00

In the photographing optical lens assembly according to the 5thembodiment, eight lens elements (510, 520, 530, 540, 550, 560, 570 and580) are made of plastic materials. At least one surface of theobject-side surface and the image-side surface of each lens element ofthe aforementioned eight lens elements is aspheric and includes at leastone inflection point. The Abbe number of the fifth lens element 550 isthe minimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 5th embodiment are listed below.

5th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 2 2 2 3 5 5Image-side surface 1 1 1 1 1 4 5 5

5th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 1 0 2 1 2 2Image-side surface 1 1 1 0 1 3 4 3

6th Embodiment

FIG. 11 is a schematic view of an imaging apparatus according to the 6thembodiment of the present disclosure. FIG. 12 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 6th embodiment. In FIG. 11, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 696. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 610, a second lens element 620, an aperture stop 600,a third lens element 630, a fourth lens element 640, a fifth lenselement 650, a sixth lens element 660, a seventh lens element 670, aneighth lens element 680, a filter 690 and an image surface 695. Theimage sensor 696 is disposed on the image surface 695 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (610, 620, 630, 640, 650, 660, 670and 680) without additional one or more lens elements inserted betweenthe first lens element 610 and the eighth lens element 680.

The first lens element 610 with negative refractive power has anobject-side surface 611 being convex in a paraxial region thereof and animage-side surface 612 being concave in a paraxial region thereof. Thefirst lens element 610 is made of a plastic material, and has theobject-side surface 611 and the image-side surface 612 being bothaspheric. Furthermore, the image-side surface 612 of the first lenselement 610 includes at least one inflection point.

The second lens element 620 with positive refractive power has anobject-side surface 621 being convex in a paraxial region thereof and animage-side surface 622 being concave in a paraxial region thereof. Thesecond lens element 620 is made of a plastic material, and has theobject-side surface 621 and the image-side surface 622 being bothaspheric. Furthermore, the object-side surface 621 of the second lenselement 620 includes at least one inflection point.

The third lens element 630 with positive refractive power has anobject-side surface 631 being convex in a paraxial region thereof and animage-side surface 632 being convex in a paraxial region thereof. Thethird lens element 630 is made of a plastic material, and has theobject-side surface 631 and the image-side surface 632 being bothaspheric. Furthermore, the object-side surface 631 of the third lenselement 630 includes at least one inflection point.

The fourth lens element 640 with positive refractive power has anobject-side surface 641 being convex in a paraxial region thereof and animage-side surface 642 being convex in a paraxial region thereof. Thefourth lens element 640 is made of a plastic material, and has theobject-side surface 641 and the image-side surface 642 being bothaspheric. Furthermore, the object-side surface 641 of the fourth lenselement 640 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 642of the fourth lens element 640 includes at least one inflection point.

The fifth lens element 650 with negative refractive power has anobject-side surface 651 being concave in a paraxial region thereof andan image-side surface 652 being convex in a paraxial region thereof. Thefifth lens element 650 is made of a plastic material, and has theobject-side surface 651 and the image-side surface 652 being bothaspheric. Furthermore, the object-side surface 651 of the fifth lenselement 650 includes at least one inflection point. The image-sidesurface 652 of the fifth lens element 650 includes at least oneinflection point.

The sixth lens element 660 with positive refractive power has anobject-side surface 661 being convex in a paraxial region thereof and animage-side surface 662 being convex in a paraxial region thereof. Thesixth lens element 660 is made of a plastic material, and has theobject-side surface 661 and the image-side surface 662 being bothaspheric. Furthermore, the object-side surface 661 of the sixth lenselement 660 includes at least one inflection point. The image-sidesurface 662 of the sixth lens element 660 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The seventh lens element 670 with negative refractive power has anobject-side surface 671 being concave in a paraxial region thereof andan image-side surface 672 being concave in a paraxial region thereof.The seventh lens element 670 is made of a plastic material, and has theobject-side surface 671 and the image-side surface 672 being bothaspheric. Furthermore, the object-side surface 671 of the seventh lenselement 670 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 672of the seventh lens element 670 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 680 with negative refractive power has anobject-side surface 681 being convex in a paraxial region thereof and animage-side surface 682 being concave in a paraxial region thereof. Theeighth lens element 680 is made of a plastic material, and has theobject-side surface 681 and the image-side surface 682 being bothaspheric. Furthermore, the object-side surface 681 of the eighth lenselement 680 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 682of the eighth lens element 680 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 690 is made of a glass material and located between theeighth lens element 680 and the image surface 695, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 6th embodiment are shown in TABLE 11and the aspheric surface data are shown in TABLE 12 below.

TABLE 11 6th Embodiment f = 1.01 mm, Fno = 1.65, HFOV = 67.7 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 3.785 ASP 0.385 Plastic 1.545 56.1−1.49 2 0.646 ASP 0.643 3 Lens 2 1.259 ASP 0.325 Plastic 1.656 21.3 5.104 1.813 ASP 0.246 5 Ape. Stop Plano −0.018  6 Lens 3 3.913 ASP 0.498Plastic 1.534 55.9 2.82 7 −2.342 ASP 0.047 8 Lens 4 2.740 ASP 0.522Plastic 1.534 55.9 1.62 9 −1.177 ASP 0.077 10 Lens 5 −0.504 ASP 0.200Plastic 1.669 19.4 −1.06 11 −1.998 ASP 0.054 12 Lens 6 0.770 ASP 0.499Plastic 1.544 56.0 1.19 13 −3.150 ASP 0.100 14 Lens 7 −200.000 ASP 0.200Plastic 1.669 19.4 −22.84 15 16.551 ASP 0.100 16 Lens 8 1.369 ASP 0.372Plastic 1.544 56.0 −15.17 17 1.062 ASP 0.400 18 Filter Plano 0.110 Glass1.517 64.2 — 19 Plano 0.110 20 Image Plano — Reference wavelength is587.6 nm (d-line).

TABLE 12 Aspheric Coefficients Surface # 1 2 3 4 6 7 8 9 k = −1.2132E+01−8.5943E−01  −1.0555E+00 −3.8411E+00  −1.3441E+01 −2.6835E+00−6.8074E+01 −5.2218E−01 A4 =  1.1576E−01 2.6058E−01  1.4575E−014.5484E−01  4.1737E−02 −1.8495E+00 −1.4948E+00  1.4999E+00 A6 =−1.0035E−01 3.4169E−01  4.5242E−01 1.6637E+00 −5.2556E−01  6.9189E+00 5.7514E+00 −5.3905E+00 A8 =  5.7698E−02 −1.5560E+00  −2.0936E−02−1.2528E+01   4.1208E+00 −1.8814E+01 −1.8366E+01 −5.2629E+00 A10 =−2.0362E−02 2.9019E+00 −3.3183E+00 9.2962E+01 −1.4067E+01  2.7162E+01 4.7174E+01  4.5979E+01 A12 =  3.9877E−03 −1.9804E+00   1.3404E+01−2.8533E+02   1.5078E+01 −1.8117E+01 −8.0674E+01 −7.4889E+01 A14 =−3.2594E−04 2.5945E−02 −1.6285E+01 3.6115E+02  5.7211E+01  4.0737E+01Surface # 10 11 12 13 14 15 16 17 k = −6.0558E+00 −7.3661E+01−9.4966E+00 −3.3346E+00 −1.0000E+00 −8.1690E+01 −7.8808E+00 −8.8775E+00A4 =  9.2233E−01 −1.7923E−01 −3.2875E−01 −4.2163E−01 −1.0086E−01 1.8010E−01 −4.9642E−01 −4.0576E−01 A6 = −1.4510E+00  7.8047E−01 6.4659E−01  6.5314E−01  2.1646E−01 −1.0729E−01  1.0689E+00  5.9534E−01A8 = −2.0716E+01 −1.0877E+00 −7.7674E−01 −1.7419E−01 −2.6355E−01−1.0622E−01 −1.1252E+00 −5.4060E−01 A10 =  9.5404E+01 −7.5144E−01 5.7926E−01 −1.7084E−01  1.8792E−01  1.3540E−01  6.4352E−01  2.9270E−01A12 = −1.8979E+02  3.0149E+00 −2.5325E−01  1.3895E−01 −7.2371E−02−5.5752E−02 −2.0322E−01 −8.8635E−02 A14 =  1.8861E+02 −2.4105E+00 5.8315E−02 −3.9052E−02  1.3919E−02  1.0149E−02  3.3111E−02  1.3698E−02A16 = −7.5240E+01  6.1906E−01 −5.3932E−03  4.0197E−03 −1.0499E−03−6.9329E−04 −2.1671E−03 −8.3906E−04

In the 6th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 6th embodiment, so an explanation in thisregard will not be provided again. Furthermore, three values ofparameter Yc82/Y82 in the following table are respectively correspondingto three critical points located from the axial vertex to the maximumeffective diameter position in the off-axis region of the image-sidesurface 682 of the eighth lens element 680.

Moreover, these parameters can be calculated from TABLE 11 and TABLE 12as the following values and satisfy the following conditions:

6th Embodiment f [mm] 1.01 Fno 1.65 HFOV [deg.] 67.7 N4 1.53 Vmin 19.4(CT7 + CT8)/CT6 1.15 SL/TL 0.67 T12/CT2 1.98 T56/Tavg 0.30 TD/(CT3 +T34 + CT4 + T45 + CT5) 3.16 TL [mm] 4.87 TL/EPD 7.99 TL/f 4.84 TL/ImgH2.12 (R1 + R2)/(R1 − R2) 1.41 f/EPD 1.65 f/f1 −0.67 f/f2 0.20 f/f3 0.36f/f4 0.62 f/f5 −0.95 f/f6 0.84 f/f7 −0.04 f/f8 −0.07 f/f12 −0.45 f/f1230.12 f/|R1| 0.27 |P|max 0.95 CRA [deg.] 32.6 ImgH [mm] 2.29 ImgH/f 2.28Y11/Y82 0.91 Y82/CT8 5.33 Y82/f 1.97 Yc82/Y82 0.50, 0.66, 0.80

In the photographing optical lens assembly according to the 6thembodiment, eight lens elements (610, 620, 630, 640, 650, 660, 670 and680) are made of plastic materials. At least one surface of theobject-side surface and the image-side surface of each lens element ofthe aforementioned eight lens elements is aspheric and includes at leastone inflection point. The Abbe numbers of the fifth lens element 650 andthe seventh lens element 670 are the minimum values Vmin among Abbenumbers of the lens elements of the photographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 6th embodiment are listed below.

6th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 1 1 2 2 3 3 4Image-side surface 1 0 0 1 2 2 3 4

6th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 0 1 0 0 1 1Image-side surface 0 0 0 0 0 1 1 3

7th Embodiment

FIG. 13 is a schematic view of an imaging apparatus according to the 7thembodiment of the present disclosure. FIG. 14 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 7th embodiment. In FIG. 13, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 796. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 710, a second lens element 720, a third lens element730, an aperture stop 700, a fourth lens element 740, a fifth lenselement 750, a sixth lens element 760, a seventh lens element 770, aneighth lens element 780, a filter 790 and an image surface 795. Theimage sensor 796 is disposed on the image surface 795 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (710, 720, 730, 740, 750, 760, 770and 780) without additional one or more lens elements inserted betweenthe first lens element 710 and the eighth lens element 780.

The first lens element 710 with negative refractive power has anobject-side surface 711 being convex in a paraxial region thereof and animage-side surface 712 being concave in a paraxial region thereof. Thefirst lens element 710 is made of a glass material, and has theobject-side surface 711 and the image-side surface 712 being bothspherical.

The second lens element 720 with positive refractive power has anobject-side surface 721 being concave in a paraxial region thereof andan image-side surface 722 being convex in a paraxial region thereof. Thesecond lens element 720 is made of a plastic material, and has theobject-side surface 721 and the image-side surface 722 being bothaspheric. Furthermore, the object-side surface 721 of the second lenselement 720 includes at least one inflection point. The image-sidesurface 722 of the second lens element 720 includes at least oneinflection point.

The third lens element 730 with positive refractive power has anobject-side surface 731 being convex in a paraxial region thereof and animage-side surface 732 being concave in a paraxial region thereof. Thethird lens element 730 is made of a plastic material, and has theobject-side surface 731 and the image-side surface 732 being bothaspheric. Furthermore, the image-side surface 732 of the third lenselement 730 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The fourth lens element 740 with positive refractive power has anobject-side surface 741 being convex in a paraxial region thereof and animage-side surface 742 being convex in a paraxial region thereof. Thefourth lens element 740 is made of a plastic material, and has theobject-side surface 741 and the image-side surface 742 being bothaspheric. Furthermore, the object-side surface 741 of the fourth lenselement 740 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The fifth lens element 750 with negative refractive power has anobject-side surface 751 being concave in a paraxial region thereof andan image-side surface 752 being convex in a paraxial region thereof. Thefifth lens element 750 is made of a plastic material, and has theobject-side surface 751 and the image-side surface 752 being bothaspheric. Furthermore, the image-side surface 752 of the fifth lenselement 750 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The sixth lens element 760 with negative refractive power has anobject-side surface 761 being convex in a paraxial region thereof and animage-side surface 762 being concave in a paraxial region thereof. Thesixth lens element 760 is made of a plastic material, and has theobject-side surface 761 and the image-side surface 762 being bothaspheric. Furthermore, the object-side surface 761 of the sixth lenselement 760 includes at least one inflection point. The image-sidesurface 762 of the sixth lens element 760 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The seventh lens element 770 with positive refractive power has anobject-side surface 771 being convex in a paraxial region thereof and animage-side surface 772 being convex in a paraxial region thereof. Theseventh lens element 770 is made of a plastic material, and has theobject-side surface 771 and the image-side surface 772 being bothaspheric. Furthermore, the object-side surface 771 of the seventh lenselement 770 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 772of the seventh lens element 770 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 780 with negative refractive power has anobject-side surface 781 being convex in a paraxial region thereof and animage-side surface 782 being concave in a paraxial region thereof. Theeighth lens element 780 is made of a plastic material, and has theobject-side surface 781 and the image-side surface 782 being bothaspheric. Furthermore, the object-side surface 781 of the eighth lenselement 780 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 782of the eighth lens element 780 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 790 is made of a glass material and located between theeighth lens element 780 and the image surface 795, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 7th embodiment are shown in TABLE 13and the aspheric surface data are shown in TABLE 14 below.

TABLE 13 7th Embodiment f = 0.95 mm, Fno = 1.30, HFOV = 75.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 8.157 0.506 Glass 1.639 55.4 −2.96 21.497 1.572 3 Lens 2 −1.790 ASP 1.113 Plastic 1.544 56.0 5.87 4 −1.399ASP 0.099 5 Lens 3 1.770 ASP 0.474 Plastic 1.544 56.0 4.94 6 4.704 ASP−0.015  7 Ape. Stop Plano 0.393 8 Lens 4 1.582 ASP 0.582 Plastic 1.54456.0 1.64 9 −1.770 ASP 0.061 10 Lens 5 −0.924 ASP 0.206 Plastic 1.66020.4 −1.59 11 −8.496 ASP 0.030 12 Lens 6 2.446 ASP 0.264 Plastic 1.54456.0 −12.50 13 1.731 ASP 0.048 14 Lens 7 193.096 ASP 0.315 Plastic 1.54456.0 1.53 15 −0.834 ASP 0.020 16 Lens 8 0.616 ASP 0.150 Plastic 1.53455.9 −3.66 17 0.429 ASP 0.300 18 Filter Plano 0.145 Glass 1.517 64.2 —19 Plano 0.239 20 Image Plano — Reference wavelength is 587.6 nm(d-line).

TABLE 14 Aspheric Coefficients Surface # 3 4 5 6 8 9 10 k = −2.1685E+002.0949E−01  1.2043E+00  2.4835E+01 −5.8656E+00 −1.1755E+00 −5.9490E+00A4 = −4.1865E−02 2.1003E−01 −4.7135E−02 −4.9439E−01 −1.3980E−01−4.1408E−01 −1.0896E−01 A6 =  4.7373E−02 −3.0037E−02   4.3628E−02 4.6321E−01  2.8497E−03  5.8551E−01 −5.4572E−01 A8 = −1.2190E−023.1169E−02 −6.2507E−02 −2.7257E−01 −2.2811E−01  4.8796E−01  3.0143E+00A10 =  5.6481E−04 1.3711E−02  1.6590E−01 −1.9397E+00 −4.7345E+00 A12 = 1.1995E+00  2.3636E+00 Surface # 11 12 13 14 15 16 17 k = 5.6151E+01−1.8967E+00 −4.0305E−02 9.0000E+01 −9.7341E+00 −4.1304E+00 −3.6284E+00A4 = 1.0633E+00 −3.4854E−01  3.0892E−01 1.6401E+00 −2.1087E−01−8.0464E−01 −5.1450E−01 A6 = −3.7499E+00  −4.6475E−01 −4.5815E+00−7.8603E+00   5.8406E−01  1.0741E+00  6.1666E−01 A8 = 8.1599E+00 3.2032E+00  8.8148E+00 1.4646E+01  1.1872E−01 −8.5350E−01 −4.8020E−01A10 = −8.3542E+00  −3.5114E+00 −6.5073E+00 −1.2228E+01  −4.3673E−01 3.5925E−01  2.0717E−01 A12 = 3.0202E+00  1.0195E+00  1.6598E+003.7538E+00  1.3435E−01 −5.8642E−02 −3.9845E−02

In the 7th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 7th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 13 and TABLE 14as the following values and satisfy the following conditions:

7th Embodiment f [mm] 0.95 Fno 1.30 HFOV [deg.] 75.0 N4 1.54 Vmin 20.4(CT7 + CT8)/CT6 1.76 SL/TL 0.42 T12/CT2 1.41 T56/Tavg 0.10 TD/(CT3 +T34 + CT4 + T45 + CT5) 3.42 TL [mm] 6.50 TL/EPD 8.89 TL/f 6.84 TL/ImgH4.42 (R1 + R2)/(R1 − R2) 1.45 f/EPD 1.30 f/f1 −0.32 f/f2 0.16 f/f3 0.19f/f4 0.58 f/f5 −0.60 f/f6 −0.08 f/f7 0.62 f/f8 −0.26 f/f12 0.01 f/f1230.41 f/|R1| 0.12 |P|max 0.62 CRA [deg.] 35.0 ImgH [mm] 1.47 ImgH/f 1.55Y11/Y82 2.08 Y82/CT8 8.43 Y82/f 1.33 Yc82/Y82 0.78

In the photographing optical lens assembly according to the 7thembodiment, seven lens elements (720, 730, 740, 750, 760, 770 and 780)are made of plastic materials. At least one surface of the object-sidesurface and the image-side surface of each lens element of theaforementioned seven lens elements is aspheric and includes at least oneinflection point. The Abbe number of the fifth lens element 750 is theminimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 7th embodiment are listed below.

7th Embodiment - Numbers of inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 1 0 1 0 3 3 2Image-side surface 0 1 1 0 2 3 1 1

7th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 0 1 0 0 1 1Image-side surface 0 0 1 0 2 2 1 1

8th Embodiment

FIG. 15 is a schematic view of an imaging apparatus according to the 8thembodiment of the present disclosure. FIG. 16 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 8th embodiment. In FIG. 15, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 896. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 810, a second lens element 820, a third lens element830, an aperture stop 800, a fourth lens element 840, a fifth lenselement 850, a sixth lens element 860, a seventh lens element 870, aneighth lens element 880, a filter 890 and an image surface 895. Theimage sensor 896 is disposed on the image surface 895 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (810, 820, 830, 840, 850, 860, 870and 880) without additional one or more lens elements inserted betweenthe first lens element 810 and the eighth lens element 880.

The first lens element 810 with negative refractive power has anobject-side surface 811 being convex in a paraxial region thereof and animage-side surface 812 being concave in a paraxial region thereof. Thefirst lens element 810 is made of a glass material, and has theobject-side surface 811 and the image-side surface 812 being bothspherical.

The second lens element 820 with positive refractive power has anobject-side surface 821 being concave in a paraxial region thereof andan image-side surface 822 being convex in a paraxial region thereof. Thesecond lens element 820 is made of a plastic material, and has theobject-side surface 821 and the image-side surface 822 being bothaspheric. Furthermore, the object-side surface 821 of the second lenselement 820 includes at least one inflection point. The image-sidesurface 822 of the second lens element 820 includes at least oneinflection point.

The third lens element 830 with positive refractive power has anobject-side surface 831 being convex in a paraxial region thereof and animage-side surface 832 being concave in a paraxial region thereof. Thethird lens element 830 is made of a plastic material, and has theobject-side surface 831 and the image-side surface 832 being bothaspheric. Furthermore, the image-side surface 832 of the third lenselement 830 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The fourth lens element 840 with positive refractive power has anobject-side surface 841 being convex in a paraxial region thereof and animage-side surface 842 being convex in a paraxial region thereof. Thefourth lens element 840 is made of a plastic material, and has theobject-side surface 841 and the image-side surface 842 being bothaspheric. Furthermore, the object-side surface 841 of the fourth lenselement 840 includes at least one inflection point.

The fifth lens element 850 with negative refractive power has anobject-side surface 851 being concave in a paraxial region thereof andan image-side surface 852 being convex in a paraxial region thereof. Thefifth lens element 850 is made of a plastic material, and has theobject-side surface 851 and the image-side surface 852 being bothaspheric. Furthermore, the image-side surface 852 of the fifth lenselement 850 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The sixth lens element 860 with positive refractive power has anobject-side surface 861 being convex in a paraxial region thereof and animage-side surface 862 being concave in a paraxial region thereof. Thesixth lens element 860 is made of a plastic material, and has theobject-side surface 861 and the image-side surface 862 being bothaspheric. Furthermore, the object-side surface 861 of the sixth lenselement 860 includes at least one inflection point. The image-sidesurface 862 of the sixth lens element 860 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The seventh lens element 870 with positive refractive power has anobject-side surface 871 being concave in a paraxial region thereof andan image-side surface 872 being convex in a paraxial region thereof. Theseventh lens element 870 is made of a plastic material, and has theobject-side surface 871 and the image-side surface 872 being bothaspheric. Furthermore, the object-side surface 871 of the seventh lenselement 870 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 872of the seventh lens element 870 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The eighth lens element 880 with negative refractive power has anobject-side surface 881 being convex in a paraxial region thereof and animage-side surface 882 being concave in a paraxial region thereof. Theeighth lens element 880 is made of a plastic material, and has theobject-side surface 881 and the image-side surface 882 being bothaspheric. Furthermore, the object-side surface 881 of the eighth lenselement 880 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 882of the eighth lens element 880 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 890 is made of a glass material and located between theeighth lens element 880 and the image surface 895, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 8th embodiment are shown in TABLE 15and the aspheric surface data are shown in TABLE 16 below.

TABLE 15 8th Embodiment f = 0.95 mm, Fno = 1.45, HFOV = 70.0 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 9.130 0.729 Glass 1.639 55.4 −2.74 21.425 1.485 3 Lens 2 −1.628 ASP 1.083 Plastic 1.544 56.0 6.51 4 −1.377ASP 0.030 5 Lens 3 1.633 ASP 0.489 Plastic 1.534 55.9 4.45 6 4.683 ASP0.111 7 Ape. Stop Plano 0.367 8 Lens 4 1.519 ASP 0.595 Plastic 1.54456.0 1.69 9 −1.996 ASP 0.072 10 Lens 5 −0.810 ASP 0.180 Plastic 1.68018.4 −1.56 11 −3.727 ASP 0.030 12 Lens 6 1.449 ASP 0.231 Plastic 1.53455.9 18.93 13 1.598 ASP 0.076 14 Lens 7 −5.535 ASP 0.181 Plastic 1.56045.0 1.83 15 −0.875 ASP 0.020 16 Lens 8 0.732 ASP 0.150 Plastic 1.54456.0 −3.60 17 0.494 ASP 0.250 18 Filter Plano 0.110 Glass 1.517 64.2 —19 Plano 0.311 20 Image Plano — Reference wavelength is 587.6 nm(d-line).

TABLE 16 Aspheric Coefficients Surface # 3 4 5 6 8 9 10 k = −2.1925E+002.1273E−01  8.2005E−01  2.4097E+01 −3.3967E+00 −3.5016E−01 −5.8011E+00A4 = −2.1782E−02 2.4026E−01 −5.3729E−02 −4.7721E−01 −1.1363E−01−4.2213E−01  4.5642E−02 A6 =  5.1222E−02 −6.5372E−02  −1.2997E−02 4.1830E−01  1.1522E−01  2.6418E−01 −1.4200E+00 A8 = −1.5761E−029.5928E−02  2.7813E−03 −2.1668E−01 −4.0646E−01  1.8494E+00  6.0423E+00A10 =  6.8973E−04 −1.7566E−02   2.5485E−01 −4.3996E+00 −9.6939E+00 A12 = 2.7247E+00  5.2261E+00 Surface # 11 12 13 14 15 16 17 k = 9.1403E−01−9.0586E+00 −5.7930E−01 −9.0000E+01 −1.3152E+01 −2.9930E+00 −4.7993E+00A4 = 1.1097E+00 −2.9029E−01  4.6702E−01  2.2348E+00  3.3419E−01−1.6458E+00 −7.0924E−01 A6 = −4.0686E+00  −1.5437E+00 −5.4565E+00−9.7452E+00 −1.8578E+00  2.8189E+00  9.3338E−01 A8 = 9.2467E+00 5.4341E+00  1.0418E+01  1.7219E+01  4.9088E+00 −2.2820E+00 −6.1893E−01A10 = −9.5919E+00  −4.8970E+00 −7.5673E+00 −1.3982E+01 −4.7815E+00 8.9995E−01  1.9918E−01 A12 = 3.4515E+00  1.0670E+00  1.8108E+00 4.2711E+00  1.6137E+00 −1.3697E−01 −2.8156E−02

In the 8th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 8th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 15 and TABLE 16as the following values and satisfy the following conditions:

8th Embodiment f [mm] 0.95 Fno 1.45 HFOV [deg.] 70.0 N4 1.54 Vmin 18.4(CT7 + CT8)/CT6 1.43 SL/TL 0.40 T12/CT2 1.37 T56/Tavg 0.10 TD/(CT3 +T34 + CT4 + T45 + CT5) 3.21 TL [mm] 6.50 TL/EPD 9.88 TL/f 6.82 TL/ImgH4.82 (R1 + R2)/(R1 − R2) 1.37 f/EPD 1.45 f/f1 −0.35 f/f2 0.15 f/f3 0.21f/f4 0.57 f/f5 −0.61 f/f6 0.05 f/f7 0.52 f/f8 −0.26 f/f12 −0.03 f/f1230.42 f/|R1| 0.10 |P|max 0.61 CRA [deg.] 35.0 ImgH [mm] 1.35 ImgH/f 1.42Y11/Y82 2.37 Y82/CT8 7.42 Y82/f 1.17 Yc82/Y82 0.86

In the photographing optical lens assembly according to the 8thembodiment, seven lens elements (820, 830, 840, 850, 860, 870 and 880)are made of plastic materials. At least one surface of the object-sidesurface and the image-side surface of each lens element of theaforementioned seven lens elements is aspheric and includes at least oneinflection point. The Abbe number of the fifth lens element 850 is theminimum value Vmin among Abbe numbers of the lens elements of thephotographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 8th embodiment are listed below.

8th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 1 0 1 0 3 2 2Image-side surface 0 1 1 0 2 2 1 1

8th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 0 0 0 0 2 2Image-side surface 0 0 1 0 1 2 1 1

9th Embodiment

FIG. 17 is a schematic view of an imaging apparatus according to the 9thembodiment of the present disclosure. FIG. 18 shows spherical aberrationcurves, astigmatic field curves and a distortion curve of the imagingapparatus according to the 9th embodiment. In FIG. 17, the imagingapparatus includes a photographing optical lens assembly (its referencenumeral is omitted) and an image sensor 996. The photographing opticallens assembly includes, in order from an object side to an image side, afirst lens element 910, a second lens element 920, an aperture stop 900,a third lens element 930, a stop 901, a fourth lens element 940, a fifthlens element 950, a sixth lens element 960, a seventh lens element 970,an eighth lens element 980, a filter 990 and an image surface 995. Theimage sensor 996 is disposed on the image surface 995 of thephotographing optical lens assembly. The photographing optical lensassembly includes eight lens elements (910, 920, 930, 940, 950, 960, 970and 980) without additional one or more lens elements inserted betweenthe first lens element 910 and the eighth lens element 980.

The first lens element 910 with negative refractive power has anobject-side surface 911 being concave in a paraxial region thereof andan image-side surface 912 being concave in a paraxial region thereof.The first lens element 910 is made of a plastic material, and has theobject-side surface 911 and the image-side surface 912 being bothaspheric. Furthermore, the object-side surface 911 of the first lenselement 910 includes at least one inflection point and at least oneconvex critical point in an off-axis region thereof. The image-sidesurface 912 of the first lens element 910 includes at least oneinflection point.

The second lens element 920 with positive refractive power has anobject-side surface 921 being convex in a paraxial region thereof and animage-side surface 922 being concave in a paraxial region thereof. Thesecond lens element 920 is made of a plastic material, and has theobject-side surface 921 and the image-side surface 922 being bothaspheric. Furthermore, the object-side surface 921 of the second lenselement 920 includes at least one inflection point.

The third lens element 930 with positive refractive power has anobject-side surface 931 being convex in a paraxial region thereof and animage-side surface 932 being convex in a paraxial region thereof. Thethird lens element 930 is made of a plastic material, and has theobject-side surface 931 and the image-side surface 932 being bothaspheric. Furthermore, the object-side surface 931 of the third lenselement 930 includes at least one inflection point.

The fourth lens element 940 with positive refractive power has anobject-side surface 941 being convex in a paraxial region thereof and animage-side surface 942 being convex in a paraxial region thereof. Thefourth lens element 940 is made of a plastic material, and has theobject-side surface 941 and the image-side surface 942 being bothaspheric. Furthermore, the object-side surface 941 of the fourth lenselement 940 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 942of the fourth lens element 940 includes at least one inflection point.

The fifth lens element 950 with negative refractive power has anobject-side surface 951 being concave in a paraxial region thereof andan image-side surface 952 being convex in a paraxial region thereof. Thefifth lens element 950 is made of a plastic material, and has theobject-side surface 951 and the image-side surface 952 being bothaspheric. Furthermore, the image-side surface 952 of the fifth lenselement 950 includes at least one inflection point.

The sixth lens element 960 with positive refractive power has anobject-side surface 961 being convex in a paraxial region thereof and animage-side surface 962 being convex in a paraxial region thereof. Thesixth lens element 960 is made of a plastic material, and has theobject-side surface 961 and the image-side surface 962 being bothaspheric. Furthermore, the object-side surface 961 of the sixth lenselement 960 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 962of the sixth lens element 960 includes at least one inflection point.

The seventh lens element 970 with negative refractive power has anobject-side surface 971 being concave in a paraxial region thereof andan image-side surface 972 being convex in a paraxial region thereof. Theseventh lens element 970 is made of a plastic material, and has theobject-side surface 971 and the image-side surface 972 being bothaspheric. Furthermore, the object-side surface 971 of the seventh lenselement 970 includes at least one inflection point. The image-sidesurface 972 of the seventh lens element 970 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The eighth lens element 980 with negative refractive power has anobject-side surface 981 being convex in a paraxial region thereof and animage-side surface 982 being concave in a paraxial region thereof. Theeighth lens element 980 is made of a plastic material, and has theobject-side surface 981 and the image-side surface 982 being bothaspheric. Furthermore, the object-side surface 981 of the eighth lenselement 980 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface 982of the eighth lens element 980 includes at least one inflection pointand at least one critical point in an off-axis region thereof.

The filter 990 is made of a glass material and located between theeighth lens element 980 and the image surface 995, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 9th embodiment are shown in TABLE 17and the aspheric surface data are shown in TABLE 18 below.

TABLE 17 9th Embodiment f = 1.42 mm, Fno = 1.80, HFOV = 78.3 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 −7.549 ASP 0.521 Plastic 1.545 56.1−1.82 2 1.167 ASP 0.468 3 Lens 2 1.624 ASP 0.364 Plastic 1.639 23.5 8.034 2.169 ASP 0.341 5 Ape. Stop Plano −0.006 6 Lens 3 5.104 ASP 0.593Plastic 1.544 56.0 3.46 7 −2.863 ASP −0.041 8 Stop Plano 0.088 9 Lens 41.971 ASP 0.757 Plastic 1.544 56.0 2.01 10 −2.118 ASP 0.113 11 Lens 5−0.825 ASP 0.360 Plastic 1.669 19.5 −2.34 12 −2.049 ASP 0.035 13 Lens 61.099 ASP 0.417 Plastic 1.544 56.0 1.60 14 −3.651 ASP 0.050 15 Lens 7−5.505 ASP 0.200 Plastic 1.669 19.5 −9.69 16 −37.069 ASP 0.050 17 Lens 82.623 ASP 0.201 Plastic 1.566 37.4 −3.63 18 1.120 ASP 0.600 19 FilterPlano 0.210 Glass 1.517 64.2 — 20 Plano 0.295 21 Image Plano — Referencewavelength is 587.6 nm (d-line). Effective radius of Surface 8 is 0.870mm.

TABLE 18 Aspheric Coefficients Surface # 1 2 3 4 6 7 9 10 k = 6.9104E+00−1.7947E−01 −7.8059E−01 4.1574E+00 −1.5741E+01  6.2167E+00 −3.6513E+01 2.9224E−01 A4 = 8.2557E−02 −2.8699E−03 −5.4681E−02 2.6853E−02 4.1207E−02 −1.0908E+00 −5.1572E−01  6.5303E−02 A6 = −4.1001E−02  4.0802E−03  4.7034E−01 1.8723E+00 −2.5113E−01  3.5581E+00  1.6679E+00−1.2004E−01 A8 = 1.8084E−02  5.0517E−01 −1.4553E+00 −1.0984E+01  7.7504E−01 −7.4786E+00 −3.1207E+00 −2.1147E+00 A10 = −5.3981E−03 −1.9389E+00  3.7673E+00 4.2895E+01 −9.6778E−01  8.3492E+00  3.2356E+00 5.5603E+00 A12 = 9.7772E−04  3.5326E+00 −4.6843E+00 −8.1744E+01 −3.9245E+00 −1.7852E+00 −6.2693E+00 A14 = −9.6504E−05  −2.8227E+00 1.9314E+00 6.0482E+01  4.2909E−01  3.5162E+00 A16 = 3.9957E−06 7.8889E−01 −7.7724E−01 Surface # 11 12 13 14 15 16 17 18 k =−8.4238E−01 −1.2003E+00 −1.3671E+01 −2.0248E+00 4.0611E+00 −3.1104E+01−2.9505E+01 −5.3053E+00 A4 =  1.0394E+00 −1.6786E−01  1.2302E−01 4.4273E−01 1.3335E−01  2.6459E−01  8.1406E−02 −2.0569E−01 A6 =−2.1955E+00  7.9826E−01 −9.0615E−01 −2.1672E+00 −8.9689E−01  −6.8981E−01−8.1331E−01  1.3394E−01 A8 =  3.2720E+00 −8.6422E−01  1.8799E+00 4.2954E+00 1.9553E+00  1.0306E+00  1.3918E+00 −7.3448E−02 A10 =−4.1045E+00  1.9276E−01 −2.2387E+00 −4.5218E+00 −2.1512E+00  −8.7497E−01−1.1076E+00  4.4369E−02 A12 =  3.6167E+00  2.9541E−01  1.5311E+00 2.7420E+00 1.3098E+00  4.2421E−01  4.7884E−01 −2.1045E−02 A14 =−1.7112E+00 −2.1662E−01 −5.8869E−01 −9.6866E−01 −4.4857E−01  −1.1650E−01−1.1536E−01  5.6370E−03 A16 =  3.0763E−01  4.3005E−02  1.1666E−01 1.8687E−01 8.1343E−02  1.6854E−02  1.4493E−02 −7.4736E−04 A18 =−9.0759E−03 −1.5322E−02 −6.1016E−03  −9.9832E−04 −7.3631E−04  3.8225E−05

In the 9th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 9th embodiment, so an explanation in thisregard will not be provided again.

Moreover, these parameters can be calculated from TABLE 17 and TABLE 18as the following values and satisfy the following conditions:

9th Embodiment f [mm] 1.42 Fno 1.80 HFOV [deg.] 78.3 N4 1.54 Vmin 19.5(CT7 + CT8)/CT6 0.96 SL/TL 0.70 T12/CT2 1.29 T56/Tavg 0.22 TD/(CT3 +T34 + CT4 + T45 + CT5) 2.41 TL [mm] 5.62 TL/EPD 7.13 TL/f 3.96 TL/ImgH2.31 (R1 + R2)/(R1 − R2) 0.73 f/EPD 1.80 f/f1 −0.78 f/f2 0.18 f/f3 0.41f/f4 0.71 f/f5 −0.60 f/f6 0.88 f/f7 −0.15 f/f8 −0.39 f/f12 −0.60 f/f1230.03 f/|R1| 0.19 |P|max 0.88 CRA [deg.] 34.7 ImgH [mm] 2.43 ImgH/f 1.72Y11/Y82 1.17 Y82/CT8 9.52 Y82/f 1.35 Yc82/Y82 0.63

In the photographing optical lens assembly according to the 9thembodiment, eight lens elements (910, 920, 930, 940, 950, 960, 970 and980) are made of plastic materials. At least one surface of theobject-side surface and the image-side surface of each lens element ofthe aforementioned eight lens elements is aspheric and includes at leastone inflection point. The Abbe numbers of the fifth lens element 950 andthe seventh lens element 970 are the minimum values Vmin among Abbenumbers of the lens elements of the photographing optical lens assembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 9th embodiment are listed below.

9th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 1 2 0 1 1 3Image-side surface 1 0 0 1 2 1 2 1

9th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 0 0 1 0 1 0 3Image-side surface 0 0 0 0 0 0 2 1

10th Embodiment

FIG. 19 is a schematic view of an imaging apparatus according to the10th embodiment of the present disclosure. FIG. 20 shows sphericalaberration curves, astigmatic field curves and a distortion curve of theimaging apparatus according to the 10th embodiment. In FIG. 19, theimaging apparatus includes a photographing optical lens assembly (itsreference numeral is omitted) and an image sensor 1096. Thephotographing optical lens assembly includes, in order from an objectside to an image side, a first lens element 1010, an aperture stop 1000,a second lens element 1020, a third lens element 1030, a fourth lenselement 1040, a fifth lens element 1050, a sixth lens element 1060, aseventh lens element 1070, an eighth lens element 1080, a filter 1090and an image surface 1095. The image sensor 1096 is disposed on theimage surface 1095 of the photographing optical lens assembly. Thephotographing optical lens assembly includes eight lens elements (1010,1020, 1030, 1040, 1050, 1060, 1070 and 1080) without additional one ormore lens elements inserted between the first lens element 1010 and theeighth lens element 1080.

The first lens element 1010 with negative refractive power has anobject-side surface 1011 being convex in a paraxial region thereof andan image-side surface 1012 being concave in a paraxial region thereof.The first lens element 1010 is made of a plastic material, and has theobject-side surface 1011 and the image-side surface 1012 being bothaspheric. Furthermore, the object-side surface 1011 of the first lenselement 1010 includes at least one inflection point.

The second lens element 1020 with positive refractive power has anobject-side surface 1021 being convex in a paraxial region thereof andan image-side surface 1022 being convex in a paraxial region thereof.The second lens element 1020 is made of a plastic material, and has theobject-side surface 1021 and the image-side surface 1022 being bothaspheric. Furthermore, the object-side surface 1021 of the second lenselement 1020 includes at least one inflection point.

The third lens element 1030 with negative refractive power has anobject-side surface 1031 being convex in a paraxial region thereof andan image-side surface 1032 being concave in a paraxial region thereof.The third lens element 1030 is made of a plastic material, and has theobject-side surface 1031 and the image-side surface 1032 being bothaspheric. Furthermore, the object-side surface 1031 of the third lenselement 1030 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface1032 of the third lens element 1030 includes at least one inflectionpoint and at least one critical point in an off-axis region thereof.

The fourth lens element 1040 with positive refractive power has anobject-side surface 1041 being convex in a paraxial region thereof andan image-side surface 1042 being concave in a paraxial region thereof.The fourth lens element 1040 is made of a plastic material, and has theobject-side surface 1041 and the image-side surface 1042 being bothaspheric. Furthermore, the object-side surface 1041 of the fourth lenselement 1040 includes at least one inflection point. The image-sidesurface 1042 of the fourth lens element 1040 includes at least oneinflection point and at least one critical point in an off-axis regionthereof.

The fifth lens element 1050 with positive refractive power has anobject-side surface 1051 being convex in a paraxial region thereof andan image-side surface 1052 being convex in a paraxial region thereof.The fifth lens element 1050 is made of a plastic material, and has theobject-side surface 1051 and the image-side surface 1052 being bothaspheric. Furthermore, the object-side surface 1051 of the fifth lenselement 1050 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface1052 of the fifth lens element 1050 includes at least one inflectionpoint and at least one critical point in an off-axis region thereof.

The sixth lens element 1060 with negative refractive power has anobject-side surface 1061 being convex in a paraxial region thereof andan image-side surface 1062 being concave in a paraxial region thereof.The sixth lens element 1060 is made of a plastic material, and has theobject-side surface 1061 and the image-side surface 1062 being bothaspheric. Furthermore, the object-side surface 1061 of the sixth lenselement 1060 includes at least one inflection point and at least onecritical point in an off-axis region thereof. The image-side surface1062 of the sixth lens element 1060 includes at least one inflectionpoint and at least one critical point in an off-axis region thereof.

The seventh lens element 1070 with positive refractive power has anobject-side surface 1071 being convex in a paraxial region thereof andan image-side surface 1072 being concave in a paraxial region thereof.The seventh lens element 1070 is made of a plastic material, and has theobject-side surface 1071 and the image-side surface 1072 being bothaspheric.

Furthermore, the object-side surface 1071 of the seventh lens element1070 includes at least one inflection point and at least one criticalpoint in an off-axis region thereof. The image-side surface 1072 of theseventh lens element 1070 includes at least one inflection point and atleast one critical point in an off-axis region thereof.

The eighth lens element 1080 with positive refractive power has anobject-side surface 1081 being convex in a paraxial region thereof andan image-side surface 1082 being convex in a paraxial region thereof.The eighth lens element 1080 is made of a plastic material, and has theobject-side surface 1081 and the image-side surface 1082 being bothaspheric. Furthermore, the image-side surface 1082 of the eighth lenselement 1080 includes at least one inflection point and at least onecritical point in an off-axis region thereof.

The filter 1090 is made of a glass material and located between theeighth lens element 1080 and the image surface 1095, and will not affectthe focal length of the photographing optical lens assembly.

The detailed optical data of the 10th embodiment are shown in TABLE 19and the aspheric surface data are shown in TABLE 20 below.

TABLE 19 10th Embodiment f = 1.85 mm, Fno = 1.75, HFOV = 62.1 deg.Surface # Curvature Radius Thickness Material Index Abbe # Focal Length0 Object Plano Infinity 1 Lens 1 12.365 ASP 0.256 Plastic 1.545 56.1−2.53 2 1.231 ASP 0.547 3 Ape. Stop Plano −0.061  4 Lens 2 2.585 ASP0.925 Plastic 1.544 56.0 2.63 5 −2.790 ASP 0.273 6 Lens 3 5.387 ASP0.142 Plastic 1.688 18.7 −8.30 7 2.742 ASP 0.047 8 Lens 4 1.833 ASP0.607 Plastic 1.544 56.0 67.42 9 1.705 ASP 0.148 10 Lens 5 3.529 ASP0.836 Plastic 1.544 56.0 1.77 11 −1.215 ASP 0.109 12 Lens 6 1.020 ASP0.302 Plastic 1.688 18.7 −2.81 13 0.587 ASP 0.219 14 Lens 7 1.446 ASP0.373 Plastic 1.544 56.0 4.96 15 2.831 ASP 0.234 16 Lens 8 54.510 ASP0.281 Plastic 1.544 56.0 29.52 17 −22.721 ASP 0.250 18 Filter Plano0.080 Glass 1.517 64.2 — 19 Plano 0.237 20 Image Plano — Referencewavelength is 587.6 nm (d-line).

TABLE 20 Aspheric Coefficients Surface # 1 2 4 5 6 7 8 9 k = −3.4116E+01−8.4126E+00 3.0842E+00  1.5331E+00 2.6832E+01 −1.0000E+00 −2.8174E+01−1.2429E+01 A4 =  2.9257E−01  1.0064E+00 −9.7058E−03  −1.6835E−018.8567E−02  1.2996E−02 −4.3589E−02 −1.2512E−01 A6 = −3.9730E−01−1.2702E+00 1.3602E−02 −1.0929E−01 −1.3660E+00  −7.5002E−01 −9.9092E−02 2.2726E−02 A8 =  3.8311E−01  2.0009E+00 −4.1579E−01   3.8446E−012.4628E+00  1.1816E+00  1.2433E−01 −7.7071E−02 A10 = −2.7035E−01−1.8709E+00 9.7186E−01 −8.4209E−01 −2.7267E+00  −8.8840E−01  2.4131E−02 4.8777E−02 A12 =  1.1971E−01  9.5837E−01 −1.1188E+00   8.7790E−011.6266E+00  3.5213E−01 −8.7277E−02 −7.7169E−03 A14 = −2.9104E−02−2.0887E−01 2.3467E−01 −3.9033E−01 −4.3942E−01  −5.8579E−02  4.3688E−02A16 =  3.0227E−03 −7.1492E−03 Surface # 10 11 12 13 14 15 16 17 k =−3.5055E+00 −1.7215E+00 −1.5120E+00 −1.0826E+00 −4.5086E+00 −3.2708E+01−9.0000E+01 6.3112E+01 A4 =  4.0721E−02  1.9934E−01 −3.2008E−01−7.5861E−01  2.1811E−01  1.0502E−01 1.3369E−01 A6 = −8.5557E−02−2.1784E−01  7.2588E−02  6.0156E−01 −7.0493E−01 −3.4651E−01 −1.6603E−01 A8 =  4.4280E−02  1.3165E−01  2.9983E−02 −3.4277E−01  8.8365E−01 4.6830E−01 9.0669E−02 A10 = −5.4004E−03  4.4570E−02 −3.4090E−02 1.4244E−01 −6.0331E−01 −3.2404E−01 −2.6409E−02  A12 = −8.9738E−04−1.0166E−01  1.0530E−02 −4.4311E−02  2.4386E−01  1.2767E−01 4.3818E−03A14 =  5.8190E−02 −1.2848E−03  1.0188E−02 −6.0083E−02 −3.0046E−02−4.1203E−04  A16 = −1.6683E−02  5.2841E−05 −1.6170E−03  8.8676E−03 4.1979E−03 2.0170E−05 A18 =  2.4294E−03  1.5447E−04 −7.2070E−04−3.2229E−04 −3.8905E−07  A20 = −1.4109E−04 −6.5566E−06  2.4805E−05 1.0500E−05

In the 10th embodiment, the equation of the aspheric surface profiles ofthe aforementioned lens elements is the same as the equation of the 1stembodiment. Also, the definitions of these parameters shown in thefollowing table are the same as those stated in the 1st embodiment withcorresponding values for the 10th embodiment, so an explanation in thisregard will not be provided again. Furthermore, five values of parameterYc82/Y82 in the following table are respectively corresponding to fivecritical points located from the axial vertex to the maximum effectivediameter position in the off-axis region of the image-side surface 1082of the eighth lens element 1080.

Moreover, these parameters can be calculated from TABLE 19 and TABLE 20as the following values and satisfy the following conditions:

10th Embodiment f [mm] 1.85 Fno 1.75 HFOV [deg.] 62.1 N4 1.54 Vmin 18.7(CT7 + CT8)/CT6 2.17 SL/TL 0.86 T12/CT2 0.53 T56/Tavg 0.50 TD/(CT3 +T34 + CT4 + T45 + CT5) 2.94 TL [mm] 5.81 TL/EPD 5.50 TL/f 3.14 TL/ImgH2.04 (R1 + R2)/(R1 − R2) 1.22 f/EPD 1.75 f/f1 −0.73 f/f2 0.70 f/f3 −0.22f/f4 0.03 f/f5 1.04 f/f6 −0.66 f/f7 0.37 f/f8 0.06 f/f12 0.19 f/f123−0.08 f/|R1| 0.15 |P|max 1.04 CRA [deg.] 33.6 ImgH [mm] 2.84 ImgH/f 1.54Y11/Y82 0.46 Y82/CT8 9.10 Y82/f 1.38 Yc82/Y82 0.12, 0.39, 0.65, 0.78,0.98

In the photographing optical lens assembly according to the 10thembodiment, eight lens elements (1010, 1020, 1030, 1040, 1050, 1060,1070 and 1080) are made of plastic materials. At least one surface ofthe object-side surface and the image-side surface of each lens elementof the aforementioned eight lens elements is aspheric and includes atleast one inflection point. The Abbe numbers of the third lens element1030 and the sixth lens element 1060 are the minimum values Vmin amongAbbe numbers of the lens elements of the photographing optical lensassembly.

Specifically, numbers of inflection points and critical points in theoff-axis regions of the object-side surfaces and the image-side surfacesof the eight lens elements in the 10th embodiment are listed below.

10th Embodiment - Numbers of Inflection Points Lens 1 Lens 2 Lens 3 Lens4 Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 1 1 1 2 1 1 1 0Image-side surface 0 0 2 2 2 1 1 5

10th Embodiment - Numbers of Critical Points Lens 1 Lens 2 Lens 3 Lens 4Lens 5 Lens 6 Lens 7 Lens 8 Object-side surface 0 0 1 0 1 1 1 0Image-side surface 0 0 1 1 2 1 1 5

11th Embodiment

FIG. 24 is a three-dimensional schematic view of an imaging apparatus 10according to the 11th embodiment of the present disclosure. In FIG. 24,the imaging apparatus 10 of the 11th embodiment is a camera module, theimaging apparatus 10 includes an imaging lens assembly 11, a drivingapparatus 12 and an image sensor 13, wherein the imaging lens assembly11 includes the photographing optical lens assembly according to thepresent disclosure and a lens barrel (its reference numeral is omitted)for carrying the photographing optical lens assembly. The imagingapparatus 10 can focus light from an imaged object via the imaging lensassembly 11, perform image focusing by the driving apparatus 12, andgenerate an image on the image sensor 13, and the imaging informationcan be transmitted.

The driving apparatus 12 can be an auto-focus module, which can bedriven by driving systems, such as voice coil motors (VCM), microelectro-mechanical systems (MEMS), piezoelectric systems, and shapememory alloys etc. The photographing optical lens assembly can obtain afavorable imaging position by the driving apparatus 12 so as to captureclear images when the imaged object is disposed at different objectdistances.

The imaging apparatus 10 can include the image sensor 13 located on theimage surface of the photographing optical lens assembly, such as CMOSand CCD, with superior sensitivity and low noise. Thus, it is favorablefor providing realistic images with high definition image qualitythereof.

Moreover, the imaging apparatus 10 can further include an imagestabilization module 14, which can be a kinetic energy sensor, such asan accelerometer, a gyro sensor, and a Hall Effect sensor. In the 11thembodiment, the image stabilization module 14 is a gyro sensor, but isnot limited thereto. Therefore, the variation of different axialdirections of the photographing optical lens assembly can adjusted so asto compensate the image blur generated by motion at the moment ofexposure, and it is further favorable for enhancing the image qualitywhile photographing in motion and low light situation. Furthermore,advanced image compensation functions, such as optical imagestabilizations (OIS) and electronic image stabilizations (EIS) etc., canbe provided.

12th Embodiment

FIG. 25A is a schematic view of one side of an electronic device 20according to the 12th embodiment of the present disclosure. FIG. 25B isa schematic view of another side of the electronic device 20 of FIG.25A. FIG. 25C is a system schematic view of the electronic device 20 ofFIG. 25A. In FIGS. 25A, 29B and 29C, the electronic device 20 accordingto the 12th embodiment is a smartphone, wherein the electronic device 20includes imaging apparatuses 80, 90, a flash module 21, a focusingassisting module 22, an image signal processor 23, a user interface 24and an image software processor 25. The imaging apparatus 80 includes animaging lens module 81, a driving apparatus 82, an image sensor 83 andan image stabilization module 84. The imaging apparatus 90 includes animaging lens module 91, a driving apparatus 92, an image sensor 93 andan image stabilization module 94. At least one of the imaging lensmodules 81 and 91 includes a photographing optical lens assemblyaccording to the present disclosure. Furthermore, the imaging propertiesof the imaging apparatuses 80 and 90 may be not the same. Thearrangements and the imaging properties of the imaging apparatuses 80and 90 are not limited thereto.

When the user captures images of an imaged object 26 via the userinterface 24, the electronic device 20 focuses and generates images viaat least one of the imaging apparatuses 80 and 90 (that is, a single ora plurality of images are captured by the imaging apparatuses 80 and 90)while compensating for low illumination via the flash module 21 whennecessary. Then, the electronic device 20 quickly focuses on the imagedobject according to its object distance information provided by thefocusing assisting module 22, and optimizes the image via the imagesignal processor 23 (ISP) and the image software processor 25. Thus, theimage quality can be further enhanced. The focusing assisting module 22can adopt infrared or laser for obtaining quick focusing, and the userinterface 24 can utilize a touch screen or a physical button forcapturing and processing the image with various functions of the imageprocessing software.

At least one of the imaging apparatuses 80 and 90 according to the 12thembodiment is the same as the imaging apparatus 10 according to the 11thembodiment, and will not describe again herein.

13th Embodiment

FIG. 26 is a schematic view of an electronic device 30 according to the13th embodiment of the present disclosure. The electronic device 30 ofthe 13th embodiment is a wearable device, wherein the electronic device30 includes an imaging apparatus 31, and the imaging apparatus 31 can bethe same as stated in the 11th embodiment, and will not describe againherein.

The foregoing description, for purpose of explanation, has beendescribed with reference to specific embodiments. It is to be noted thatTables show different data of the different embodiments; however, thedata of the different embodiments are obtained from experiments. Theembodiments were chosen and described in order to best explain theprinciples of the disclosure and its practical applications, to therebyenable others skilled in the art to best utilize the disclosure andvarious embodiments with various modifications as are suited to theparticular use contemplated. The embodiments depicted above and theappended drawings are exemplary and are not intended to be exhaustive orto limit the scope of the present disclosure to the precise formsdisclosed. Many modifications and variations are possible in view of theabove teachings.

What is claimed is:
 1. A photographing optical lens assembly comprisingeight lens elements, the eight lens elements being, in order from anobject side to an image side: a first lens element, a second lenselement, a third lens element, a fourth lens element, a fifth lenselement, a sixth lens element, a seventh lens element and an eighth lenselement; wherein each of the eight lens elements has an object-sidesurface facing towards the object side and an image-side surface facingtowards the image side; wherein at least one surface of the object-sidesurface and the image-side surface of at least one lens element of thephotographing optical lens assembly is aspheric and comprises at leastone inflection point; wherein a half of a maximum field of view of thephotographing optical lens assembly is HFOV, an axial distance betweenthe object-side surface of the first lens element and an image surfaceis TL, an entrance pupil diameter of the photographing optical lensassembly is EPD, a curvature radius of the object-side surface of thefirst lens element is R1, a curvature radius of the image-side surfaceof the first lens element is R2, and the following conditions aresatisfied:55.0 degrees<HFOV;1.0 mm<TL<12.0 mm;4.00<TL/EPD<7.50; and−0.70<(R1+R2)/(R1−R2)<3.5.
 2. The photographing optical lens assembly ofclaim 1, wherein the first lens element has negative refractive power,and the image-side surface of the eighth lens element is concave in aparaxial region thereof and comprises at least one critical point in anoff-axis region thereof.
 3. The photographing optical lens assembly ofclaim 1, wherein the object-side surface of the eighth lens element isconvex in a paraxial region thereof, the image-side surface of theeighth lens element is concave in a paraxial region thereof andcomprises at least one critical point in an off-axis region thereof, avertical distance between the critical point in the off-axis region onthe image-side surface of the eighth lens element and an optical axis isYc82, a vertical distance between a maximum effective diameter positionof the image-side surface of the eighth lens element and the opticalaxis is Y82, and the following condition is satisfied:0.10<Yc82/Y82<0.90.
 4. The photographing optical lens assembly of claim1, wherein the at least one surface of the at least one lens element ofthe photographing optical lens assembly comprises at least one criticalpoint in an off-axis region thereof.
 5. The photographing optical lensassembly of claim 4, wherein a central thickness of the sixth lenselement is CT6, a central thickness of the seventh lens element is CT7,a central thickness of the eighth lens element is CT8, and the followingcondition is satisfied:0<(CT7+CT8)/CT6<2.20.
 6. The photographing optical lens assembly ofclaim 4, wherein an axial distance between the first lens element andthe second lens element is T12, a central thickness of the second lenselement is CT2, and the following condition is satisfied:0<T12/CT2<2.5.
 7. The photographing optical lens assembly of claim 4,wherein an axial distance between the fifth lens element and the sixthlens element is T56, an average value of axial distances between everyadjacent lens elements of the photographing optical lens assembly isTavg, and the following condition is satisfied:0<T56/Tavg<1.30.
 8. The photographing optical lens assembly of claim 4,wherein the axial distance between the object-side surface of the firstlens element and the image surface is TL, the entrance pupil diameter ofthe photographing optical lens assembly is EPD, and the followingcondition is satisfied:5.28≤TL/EPD<7.50.
 9. The photographing optical lens assembly of claim 4,wherein the axial distance between the object-side surface of the firstlens element and the image surface is TL, a focal length of thephotographing optical lens assembly is f, a maximum image height of thephotographing optical lens assembly is ImgH, a vertical distance betweena maximum effective diameter position of the object-side surface of thefirst lens element and an optical axis is Y11, a vertical distancebetween a maximum effective diameter position of the image-side surfaceof the eighth lens element and the optical axis is Y82, and thefollowing conditions are satisfied:2.40<TL/f<10.0;1.0<TL/ImgH<6.0; and0.45<Y11/Y82<3.0.
 10. The photographing optical lens assembly of claim4, wherein the curvature radius of the object-side surface of the firstlens element is R1, the curvature radius of the image-side surface ofthe first lens element is R2, and the following condition is satisfied:0.58≤(R1+R2)/(R1−R2)≤0.73.
 11. The photographing optical lens assemblyof claim 4, wherein a focal length of the photographing optical lensassembly is f, a composite focal length of the first lens element andthe second lens element is f12, and the following condition issatisfied:−0.90<f/f12<0.60.
 12. The photographing optical lens assembly of claim4, wherein a focal length of the photographing optical lens assembly isf, a composite focal length of the first lens element, the second lenselement and the third lens element is f123, and the following conditionis satisfied:−0.14<f/f123<0.54.
 13. The photographing optical lens assembly of claim4, wherein a focal length of the photographing optical lens assembly isf, the curvature radius of the object-side surface of the first lenselement is R1, and the following condition is satisfied:f/|R1|<1.60.
 14. The photographing optical lens assembly of claim 4,wherein a focal length of the photographing optical lens assembly is f,a focal length of the first lens element is f1, a focal length of thesecond lens element is f2, a focal length of the third lens element isf3, a focal length of the fourth lens element is f4, a focal length ofthe fifth lens element is f5, a focal length of the sixth lens elementis f6, a focal length of the seventh lens element is f7, a focal lengthof the eighth lens element is f8, a maximum value among |f/f1|, |f/f2|,|f/f3|, |f/f4|, |f/f5|, |f/f6|, |f/f7| and |f/f8| is |P|max, and thefollowing conditions are satisfied:|P|max≤1.0.
 15. The photographing optical lens assembly of claim 4,wherein a maximum image height of the photographing optical lensassembly is ImgH, a focal length of the photographing optical lensassembly is f, and the following condition is satisfied:1.0<ImgH/f<3.0.
 16. The photographing optical lens assembly of claim 4,wherein the object-side surface of the first lens element is planar orconcave in a paraxial region thereof and comprises at least one convexcritical point in an off-axis region thereof.
 17. The photographingoptical lens assembly of claim 4, wherein the second lens element haspositive refractive power, a focal length of the photographing opticallens assembly is f, a focal length of the second lens element is f2, andthe following condition is satisfied:0.05<f/f2<1.20.
 18. The photographing optical lens assembly of claim 4,wherein the fourth lens element has positive refractive power, arefractive index of the fourth lens element is N4, an axial distancebetween the object-side surface of the first lens element and theimage-side surface of the eighth lens element is TD, a central thicknessof the third lens element is CT3, a central thickness of the fourth lenselement is CT4, a central thickness of the fifth lens element is CT5, anaxial distance between the third lens element and the fourth lenselement is T34, an axial distance between the fourth lens element andthe fifth lens element is T45, and the following conditions aresatisfied:1.20<N4<1.60; and1.80<TD/(CT3+T34+CT4+T45+CT5)<3.80.
 19. The photographing optical lensassembly of claim 4, wherein the image-side surface of the seventh lenselement comprises at least one critical point in an off-axis regionthereof.
 20. The photographing optical lens assembly of claim 4, whereinone lens element of the photographing optical lens assembly is made of aplastic material, at least one surface of the object-side surface andthe image-side surface of the one lens element is aspheric, an Abbenumber of the one lens element is a minimum value among Abbe numbers ofthe lens elements of the photographing optical lens assembly, theminimum value among the Abbe numbers of the lens elements of thephotographing optical lens assembly is Vmin, and the following conditionis satisfied:10.0<Vmin<20.0.
 21. The photographing optical lens assembly of claim 4,further comprising an aperture stop, wherein the aperture stop isdisposed on the image side of the first lens element, an axial distancebetween the aperture stop and the image surface is SL, the axialdistance between the object-side surface of the first lens element andthe image surface is TL, and the following condition is satisfied:0.30<SL/TL≤0.86.
 22. The photographing optical lens assembly of claim 1,wherein at least five lens elements of the photographing optical lensassembly are made of plastic materials, and at least one surface of theobject-side surface and the image-side surface of each of the at leastfive lens elements is aspheric and comprises at least one inflectionpoint.
 23. The photographing optical lens assembly of claim 22, whereina focal length of the photographing optical lens assembly is f, a focallength of the first lens element is f1, a focal length of the secondlens element is f2, a focal length of the third lens element is f3, afocal length of the fourth lens element is f4, a focal length of thefifth lens element is f5, a focal length of the sixth lens element isf6, a focal length of the seventh lens element is f7, a focal length ofthe eighth lens element is f8, and the following conditions aresatisfied:−1.10<f/f1<−0.35;−0.55<f/f2<1.50;−1.00<f/f3<1.00;−1.50<f/f4<2.00;−1.50<f/f5<1.80;−1.50<f/f6<1.50;−1.50<f/f7<1.50; and−1.50<f/f8<1.00.
 24. The photographing optical lens assembly of claim22, wherein a focal length of the photographing optical lens assembly isf, the entrance pupil diameter of the photographing optical lensassembly is EPD, an incident angle of a chief ray at a maximum imageheight on the image surface of the photographing optical lens assemblyis CRA, the maximum image height of the photographing optical lensassembly is ImgH, and the following conditions are satisfied:0 mm<f<2.4 mm;1.0<f/EPD<2.2;25.0 degrees<CRA<45.0 degrees; and0.50 mm<ImgH<5.0 mm.
 25. The photographing optical lens assembly ofclaim 1, wherein at least two lens elements of the photographing opticallens assembly are made of plastic materials, the at least two lenselements are located adjacent to each other and aspheric cemented, andaspheric coefficients of the at least two lens elements are different.26. The photographing optical lens assembly of claim 1, wherein avertical distance between a maximum effective diameter position of theimage-side surface of the eighth lens element and an optical axis isY82, a central thickness of the eighth lens element is CT8, a focallength of the photographing optical lens assembly is f, and thefollowing conditions are satisfied:3.80<Y82/CT8<15.0; and1.0<Y82/f<3.0.
 27. An imaging apparatus, comprising: the photographingoptical lens assembly of claim 1; and an image sensor, wherein the imagesensor is disposed on the image surface of the photographing opticallens assembly.
 28. An electronic device, comprising: the imagingapparatus of claim 27.